As the morning light filters through the curtains, painting stripes across Luna's body, she wakes up. Her muscles ache in forgotten places, and a delicious soreness between her legs triggers flashes of last night—Ryder's fingers, Avery's hands on Caleb, and the raw sex in their car. She blinks, struggling to reconcile her conservative librarian self with the woman who moaned another man's name hours ago.

Luna turns her head to find Caleb already awake, staring at the ceiling. His profile seems sharper, as if transformed by the night. When he meets her eyes, Luna sees a storm of emotions—desire, confusion, possessiveness, and something deeper she can't name.

"Hey," he says, his voice rough with sleep and the remnants of last night's intensity.

Luna pulls the sheet higher over her breasts, a reflexive modesty that seems absurd after everything that's happened. "Hey," she replies, her throat dry. "How long have you been awake?"

"A while." Caleb's eyes flick away, then back to her. "Couldn't really sleep. Too much going on in my head."

Luna nods, understanding exactly what he means. Every time she closed her eyes last night, she sees Ryder's hungry gaze, feels Avery's confident touch guiding Caleb's hands on her body. The images are both thrilling and unsettling, like a drug she didn't know she'd been craving until she had her first taste.

"Caleb," she begins, her voice soft but resolute. She swallows hard, gathering courage. "I've been thinking. Last night was... intense."

He nods, waiting for her to continue. His eyes never leave her face, as if searching for clues to what she's really feeling.

"The thing is," Luna continues, "I think it's best if we return to our more conventional ways. I need some time to process everything." The words feel strange coming out of her mouth—part of her wants to take them back immediately, to suggest they call the Thompsons right now and see what else their new friends might have planned.

But another part, the part that's been Luna Sinclair for twenty-six years, is terrified of who she might become if she lets this continue.

Caleb's shoulders relax slightly, and he exhales. "I was thinking the same thing," he admits. "Last night was... fuck, Luna, it was incredible. But it was also a lot. And I'm not sure if I'm ready to share you like that again."

The possessiveness in his voice sends an unexpected thrill through her body. She remembers how he'd watched her with Ryder, how he'd reclaimed her afterward with a ferocity she'd never experienced from him before.

"I agree," she says, relieved that they're on the same page, yet strangely disappointed too. "I can see you're still processing, too. Let's take a step back and see where we stand."

Caleb nods, reaching across to brush a strand of hair from her face. His touch is gentle, almost reverent, so different from the rough, desperate way he'd handled her in the car. "I love you," he says simply.

"I love you, too." Luna catches his hand, pressing it against her cheek.

They lie like that for a moment, reconnecting in the quiet morning light. Then Luna sits up, keeping the sheet tucked around her.

"I should text Avery," she says. "Let her know where we stand."

Caleb nods, his expression unreadable. "Yeah, probably a good idea."

Luna reaches for her phone on the nightstand, her fingers hovering over the screen. What exactly does she say to the woman who is stroking her husband until he comes just hours ago? Who's watching as her own husband makes her come apart?

Taking a deep breath, she types out a message, reading it aloud as she composes: "Hi, Avery, Caleb, and I have been talking, and we have both decided that what happened last night was a mistake. We aren't into that kind of lifestyle. I hope you understand."

She looks at Caleb questioningly. "Does that sound okay?"

He nods, though something flickers in his eyes—doubt, perhaps, or regret. "Yeah, that's good. Clear and respectful."

Luna hits send before she can second-guess herself, then places the phone facedown on the nightstand.

"There," she says, with a finality she doesn't entirely feel. "It's done."

Caleb pulls her against his chest, his warmth comforting and familiar. Luna closes her eyes, breathing in his scent, trying to focus on this—her husband, their marriage, the life they've built together—rather than the electrifying memories of last night.

Her phone buzzes a few minutes later. Luna tenses in Caleb's arms, both dreading and eager to see Avery's response. She reaches for the device, Caleb watching over her shoulder as she reads the message.

"Avery: No problem, Luna. Ryder and I do understand. No hard feelings. Take care."

Luna shows the message to Caleb, who nods in acknowledgment.

"Good," he says. "Let's move forward from here."

The response seems straightforward enough, but something about it nags at Luna. The Avery she met last night—confident, assertive, relentless in pursuing what she wanted—doesn't seem like the type to accept rejection so easily. And the simple "take care" feels loaded somehow, as if Avery knows something Luna doesn't.

"Do you think they'll really just let it go?" Luna asks, voicing her doubts.

Caleb shrugs, his hand tracing idle patterns on her shoulder. "I don't know. But it doesn't matter. We've made our decision."

Luna nods, trying to convince herself that it's truly over, that they can return to their normal lives as if last night never happened.

Three days blur by as Luna shelves books at the middle school library, smiling and pretending her body isn't alive with phantom sensations. At night, she and Caleb make love with urgency, avoiding the shadow of that night with the Thompsons. They're nearly convinced life is back to normal until Luna's phone buzzes during dinner, Avery's name flashing like a warning.

Luna's fork pauses mid-air, her stomach tight with dread and a hint of excitement. Caleb notices, eyes flicking to the phone beside her plate.

"It's her, isn't it?" he asks, voice carefully neutral.

Luna nods, putting down her fork with deliberate slowness. Her fingers hover over the phone for a moment before she picks it up, conscious of Caleb watching her every move.

The message glows on her screen: "Hey, Luna, Ryder, and I were thinking it would be fun to make up for that night with a private workout at Iron & Desire. Just a fun workout to let loose and have some fun, nothing more. What do you say?"

Luna reads the words twice, her pulse quickening with each pass—a private workout. The phrase seems innocent enough, but after what happened at their party, Luna understands the underlying current. She slides the phone across the table to Caleb, watching his expression as he reads.

"What do you think?" she asks, studying his face for any sign of the arousal she's fighting to suppress in herself.

Caleb's eyes linger on the screen longer than necessary, his jaw working slightly. When he looks up, there's a careful restraint in his expression that tells Luna he's feeling the same conflicted desire.

"It's just a workout," he says, though they both know it's not.

Luna pushes her plate away, appetite gone.

"I don't know, Caleb. I'm not sure if I'm ready for this." She stands, carrying her half-eaten dinner to the sink, more to have something to do with her hands than out of any real need for tidiness. "What if things get out of hand again? I'm not sure I can handle that."

She doesn't say what really frightens her: not that things will get out of hand, but that she wants them to. Every night since the party, her dreams have been filled with Ryder's confident touch, Avery's knowing smile. She's woken up wet and aching, turning to Caleb with a hunger that both thrills and terrifies him.

Caleb comes up behind her, his hands settling on her shoulders, turning her to face him.

"Luna," he says, his voice gentler than she expected. "It's okay to be nervous."

His eyes search hers, and Luna feels suddenly exposed, as if he can read every forbidden thought that's been running through her mind these past three days.

"But I promise you," he continues, "it won't be like last time. We'll keep our wits about us and make sure it stays just a workout. Nothing more, nothing less."

Luna wants to believe him, wants to believe they can maintain that boundary. But she remembers how quickly things escalated at the party, how readily they both surrendered to desire.

"I'll be right there with you," Caleb says, pulling her closer, his hands sliding down to rest at the small of her back. "And if you ever feel uncomfortable, we'll leave. Okay?"

Luna leans into his embrace, breathing in his familiar scent.

"Why do you want to go?" she asks, the question muffled against his chest. "After what we decided..."

Caleb is quiet for a moment, his heartbeat steady under her ear.

"I guess I'm curious," he finally admits. "About them. About us with them. And..." He hesitates, then continues with careful honesty, "I haven't been able to stop thinking about how you looked that night. How sexually hungry you were. It's like... I want to see you lose yourself in the moment."

Luna pulls back slightly to look at his face. "Really?"

"Really." His eyes are dark with an emotion that makes her stomach flip. "It scared me a little, how much I liked seeing you like that. But I also want more of it. Of you being that free."

Luna feels a flush spread across her cheeks, down her neck. It's the most explicit they've been about that night since it happened, and hearing Caleb articulate what she's been feeling sends a jolt of arousal through her body.

"And you're sure we can keep it just as a workout?" she asks, needing the reassurance even as a part of her hopes he'll say no.

"I'm sure we can," Caleb says, his hands moving to cup her face. "We're in control this time, Luna."

She takes a deep breath, leaning into his touch. "Okay," she whispers. "Let's do it."

Before she can second-guess herself, Luna reaches for her phone and types out a response to Avery, her fingers trembling slightly. "We'll be there. See you soon." She hits send, then looks up at Caleb, a mix of trepidation and excitement coursing through her veins. "Did I just make a huge mistake?"

Caleb shakes his head, pulling her close again. "No. We're doing this together. And we'll leave together if it doesn't feel right."

The phone buzzes almost immediately with Avery's response: "Perfect! Tonight, 8 PM. We'll have the place all to ourselves. Wear something comfortable... and easy to move in."

Luna shows the message to Caleb, and something flashes in his eyes—anticipation, desire, a hint of possessiveness. His hands tighten slightly on her waist.

"Tonight," he repeats, and Luna feels the weight of those words settle between them.

They spend the evening acutely aware of each other, every touch charged with meaning. As Luna picks her workout clothes—a pair of high-waisted leggings Caleb admires and a crop top—she feels she's preparing for something more significant than exercise.

That night, they make love with breathless intensity. Caleb whispers Luna's name like a prayer, eyes locked with hers, as if claiming her before tonight. And when it's over, they lie together in the dark, neither willing to say aloud how much they're both hoping for a repeat of that wild, boundary-breaking night.

After hours, the gym is shadowy, lit only by strategically placed lights that cast eerie glows. Luna grips Caleb's hand tightly at the entrance, the lock clicking ominously behind them. Avery steps forward, her athletic body in a snug sports bra and leggings. Behind her, Ryder's muscular silhouette looms, eyes gleaming with anticipation as he appraises Luna.

"Welcome to your private session," Avery says, her voice echoing in the empty space. She moves closer to Luna, close enough for Luna to catch a whiff of her exotic, expensive perfume. "I'm glad you decided to come."

Caleb shifts beside Luna, his breathing growing shallow. Luna had been surprised when he agreed to this, and even more surprised by her own excitement. Now, standing in the gym, reality sets in—this isn't just a workout.

"We thought we'd try something different tonight," Ryder says, stepping forward to stand beside his wife. His physique is even more intimidating up close, muscles straining against his tight black shirt. "Partner exercises, but with a twist."

Avery's smile turns predatory. "We're switching partners. More interesting that way, don't you think?"

Before Luna can process what's happening, Avery slides between her and Caleb, effectively separating them. She loops her arm through Caleb's and tugs him toward the free weights section on the left side of the gym. "Come on, handsome. Let's see what you're made of."

Luna watches them go, a strange mixture of jealousy and arousal swirling in her stomach. Caleb glances back at her, his expression a mirror of her own uncertainty. She sees the question in his eyes: Should we stop this now?

"Don't worry about him," Ryder's deep voice murmurs close to Luna's ear, making her jump. His hand finds the small of her back, the heat of his palm burning through her thin workout top. "He's in good hands. Avery knows exactly what she's doing."

Across the gym, Avery instructs Caleb with sultry encouragement, "Start with bicep curls," handing him dumbbells. She presses against him, guiding his form, whispering, "Nice and slow. Feel the burn."

Meanwhile, Ryder, with a low laugh, leads Luna to the weights.

"Fitness is about pushing boundaries, finding limits, and..." he emphasizes with a firm hand on her back, "...pushing past them."

Luna allows herself to be led, acutely aware of Ryder's towering presence behind her. His hand never leaves her back, occasionally sliding lower until his fingertips graze the top of her leggings. Each touch sends little sparks of electricity up her spine.

"We'll start with squats," Ryder announces, positioning her in front of a mirror. "Form is everything."

Luna nods, trying to focus on the exercise rather than the man standing behind her. She bends her knees, lowering herself into a squat. Immediately, Ryder's hands are on her hips, adjusting her position.

"Wider stance," he instructs, his foot nudging her legs further apart. "And deeper. You can take more than that."

His words make her flush, the innuendo unmistakable. Luna complies, widening her stance and lowering herself further.

Ryder moves closer, his chest nearly touching her back. His hands remain on her hips, fingers digging slightly into the soft flesh.

"Better," he approves. "Now up and down. Slowly. Feel the burn."

Luna begins the exercise, trying to ignore the way Ryder's hands seem to be exploring more than guiding.

With each squat, his fingers spread wider, sliding from her hips to her waist, then back down to grip her more firmly.

On one descent, his thumbs press into the small of her back, massaging in small circles.

"You're tense," he observes. "Relax into it. Let your body open up."

Across the gym, Avery has Caleb on the mat, stretching his hamstrings. She bends over him, pressing her body against his back as she helps extend his reach.

"You're so tight," she purrs, her breasts pushing against his shoulder blades. "Let me help you relax."

Caleb, his voice strained, asks, "Like this?"

Avery smiles, her fingers digging into his muscles. "Perfect. Now, let's try something a little more challenging. Come with me."

She leads him to the lunges, positioning herself incredibly close to him.

"Feel the stretch in your hips," she instructs, her hand resting on his chest. "You're doing so well, Caleb."

Caleb glances back at Luna, uncertainty in his eyes. "I... I'm not sure I can keep this up," he admits.

Avery leans in, her voice a sultry whisper. "You can, and you will. I believe in you. Now, let's add a little twist. Turn your body slightly, face me, and really feel that burn."

Caleb complies, turning to face Avery, his body now fully exposed to her. Avery's hands roam his chest, her touch both reassuring and provocative.

"That's a good boy," she murmurs, eyes locked on his. "With each lunge, imagine breaking through a barrier. Show me your strength, Caleb."

Luna watches, her heart pounding in her chest. She expects to feel a surge of jealousy, but instead, a strange thrill courses through her. Seeing another woman's hands on her husband, hearing the intimate way Avery speaks to him, stokes a fire within her that she didn't know existed.

Ryder's hands move to her shoulders, massaging the tense muscles there.

"Your body's responding beautifully," he murmurs. "But your mind's still fighting it. Let go, Luna. No one's judging you here."

Luna lets her head fall forward, a small sigh escaping her lips. It feels good to be touched like this, with confidence and purpose. But she can't shake the feeling of hesitation, the voice in her head questioning what they're doing and where this will lead.

"That's it," Ryder encourages as she relaxes into his touch. "Now, let's try some assisted pull-ups."

He guides her to the pull-up bar, positioning himself directly behind her.

"Reach up," he instructs. Luna obeys, stretching her arms overhead to grasp the bar. The position makes her crop top ride up, exposing a strip of skin at her midriff. Ryder's hands immediately find this bare patch, his warm palms sliding against her flesh.

"I'll support you," he says, moving his hands to her waist. "Pull yourself up as much as you can, and I'll help with the rest."

Luna begins to pull, her muscles straining with the effort. True to his word, Ryder assists her, his hands lifting her by the waist.

But with each repetition, his grip shifts – fingers dipping slightly beneath the waistband of her leggings in the back, thumbs brushing the undersides of her ribs, dangerously close to the curves of her breasts.

Luna's gaze remains locked on Caleb and Avery, her arousal building as she watches Avery's seductive instructions and Caleb's responsive movements. The sight of them, combined with Ryder's intimate touches, creates a heady mix of sensations that leave Luna breathless and aching for more.

Ryder's lips brush against her ear, his voice a low growl. "You like watching him, don't you? Seeing another woman touch what's yours."

Luna's stunned by Ryder's question, her throat too dry to speak.

"It's okay, Luna, you don't have to answer."

The truth is, she doesn't have an answer. Or maybe she does, but isn't ready to admit it, even to herself.

Luna trembles through another pull-up, Ryder's hands boldly sliding under her top. She knows she should stop, but heat pools between her legs.

Across the gym, Caleb watches with an unreadable expression as Avery presses against him, guiding a stretch that feels more like an embrace.

"One more," Ryder encourages, his voice a low rumble against her ear. "Show me what you're capable of."

Luna grips the bar tighter and pulls herself up with renewed determination. Ryder's hands follow, ostensibly supporting her, but his thumbs now trace the outline of her ribs, inching dangerously close to the undersides of her breasts. When she lowers herself, his palms slide down her sides, fingers dipping briefly beneath the waistband of her leggings.

"Good girl," he murmurs, the praise sending an unexpected thrill through her. "You're stronger than you look."

As Luna drops from the bar, Ryder's hands linger on her hips, holding her in place with her back against his chest. She can feel the hard planes of his body, the heat radiating through their workout clothes. Most alarmingly, she can feel the unmistakable bulge of his erection pressing against her lower back.

"Let's hydrate," he says, finally releasing her. He hands her a water bottle, his fingers brushing against hers deliberately.

Luna takes a long drink to gather her thoughts. This isn't who she is—a woman turned on by another man's touch while her husband watches. Raised to value the sanctity of marriage, she never imagined feeling desire for anyone but Caleb. Yet here she stands, her body betraying her.

"You're thinking too much," Ryder observes, watching her internal struggle play across her face. "Your mind is your biggest obstacle, Luna. You're stronger than you think. Let go of what's holding you back."

His words hit something deep inside her. Hasn't she always played it safe? Always followed the rules? Always been the good girl? Where has that gotten her?

Luna's gaze drifts back to Caleb. Avery has him on a mat now, demonstrating what appears to be a partner yoga pose.

"Come on, Caleb," Avery purrs, her voice sultry as she takes his hand and places it on her hip. "Let's see how flexible you really are."

She straddles his lap, her knees pressing into the mat on either side of his hips.

"Now, wrap your arms around me and hold on tight."

Caleb swallows hard, his hands tentatively resting on Avery's waist as he looks across the room at Luna, uncertainty etched on his face. "Like this?" he asks, his voice strained.

Avery smiles, a slow, seductive curve of her lips.

"Perfect," she murmurs, leaning in to whisper in his ear. "Now, let's see if you can keep up with me."

She begins to rock her hips, grinding against him as she moves her body in a slow, sensual dance.

"Feel that?" she asks, her voice a low purr. "That's you, hard and ready for me."

Luna watches, her breath hitching as she sees the effect Avery is having on her husband.

Caleb's cheeks are flushed, his eyes dark with desire as he looks up at Avery, completely entranced by her.

"Your husband's enjoying himself," Ryder comments, following her gaze. "Avery knows exactly how to make a man feel... appreciated."

Luna should feel jealous, or even angry. Instead, she feels a perverse excitement watching another woman seduce her husband.

"I'm not sure this is appropriate," she manages to say, her voice lacking conviction.

Ryder laughs softly. "Appropriate is boring. And you, Luna Sinclair, are not boring."

He steps closer, his hand returning to the small of her back. "Now, let's work on your flexibility."

He leads her to a mat on the floor, positioning her on her back.

"Let's start with the 'Hamstring stretch,'" he says, lifting her right leg toward her chest. Though the position seems innocent, Ryder's hovering presence is not. He leans in, pinning her leg, their faces inches apart, his eyes locking onto hers.

Luna immediately feels vulnerable as her ass presents itself to him. His large hands come to rest on her lower back, warm and firm.

"Deeper," he instructs, applying gentle pressure. "You're tighter than I expected."

Ryder's hands move from Luna's back to her hips, steadying her as she stretches forward.

"Good," he murmurs, his voice closer to her ear than necessary. "Now I'm going to help you get a little deeper."

His palms slide down to the backs of her thighs, fingers splayed wide. Luna's breath catches as his thumbs trace the seam of her leggings close to where they meet at her crotch.

"Relax," he says, his grip firm as he pulls her slightly backward, pressing her ass against him. She can feel the unmistakable hardness through his shorts.

"This stretch works best when you surrender to it."

Luna forces herself to breathe, trying to ignore how exposed she feels in this position.

Ryder's gaze drops to her lips, then lower, to where her crop top has ridden up, exposing her midriff. When he switches to her left leg, his hand slides along her inner thigh, fingers grazing dangerously close to her mound before gripping her ankle to lift her leg.

Across the gym, Caleb isn't faring any better.

Luna watches as Avery guides him through what she recognizes as a groin stretch.

Avery kneels between Caleb's spread legs, her hands on his inner thighs, pushing them wider.

"That's it, Caleb," she coos, her voice a sultry whisper. "Open up for me. Let me see that flexibility."

Even from this distance, Luna can see the flush on Caleb's face, the way his chest rises and falls rapidly.

Avery shifts forward, her thigh pressing deliberately between his legs.

Caleb's head falls back, his eyes closing briefly before snapping open to find Luna watching.

Their gazes lock across the room. Luna expects to see guilt or shame in his eyes – the same emotions warring inside her. Instead, she sees desire, raw and unfiltered. Her husband is aroused by another woman's touch, and he's not hiding it from her.

"Time for the cool-down," Ryder announces, breaking the moment. He offers Luna his hand and pulls her to her feet, bringing her body flush against his in the process.

"This is where all that tension you've been building gets... released."

Luna nods mutely, allowing Ryder to position her for the stretches. He stands behind her, his chest against her back as he guides her arms overhead.

"Deep breath in," he instructs, his hands sliding down her extended arms to her shoulders, then along her sides to rest at her waist. "And exhale as you fold forward."

Luna bends at the waist, and Ryder follows, his body molding to her back, one hand splayed across her stomach to "support" her.

As she straightens, his hand doesn't leave her abdomen, instead sliding higher until his fingertips graze the underside of her breast through her top.

"Again," he murmurs, his breath hot against her ear. "Deeper this time."

Luna complies, bending forward as Ryder presses against her from behind. This time, when she rises, his hand boldly cups her breast, thumb brushing over her nipple through the fabric of her sports bra. Luna gasps but doesn't pull away.

Across the room, Avery mirrors this position with Caleb, her body pressed against his back, her hands no longer pretending to be professional as they slide beneath his shirt, exploring the ridges of his abdomen.

"You're so tense, Caleb," Avery murmurs, her lips brushing against his ear. "Let me help you relax."

Luna watches as Avery's hand moves lower, her fingers slipping beneath the waistband of Caleb's shorts.

Avery's eyes meet Luna's across the room, a wicked smile playing on her lips as she deliberately strokes Caleb through his shorts, eliciting a groan from him.

Once again, Luna's eyes meet Caleb's. In that moment, something passes between them – an unspoken question and answer. Do we do this?

Yes. There's no jealousy in his gaze, only a dark hunger that matches the ache building inside her. They're giving each other permission to cross a line they never thought they'd approach.

Ryder must sense the shift in her, the surrender. His lips brush against the sensitive skin of her neck, no longer maintaining any pretense of a workout.

"Your body's been telling me what you want all night," he whispers, his hands becoming more possessive as they roam her curves. "But I need to see you accept it."

Luna's head falls back against his shoulder, her resistance crumbling.

"And what is it that I want?" she asks, her voice barely audible.

Ryder's hand slides down her stomach, past the waistband of her leggings, his fingers dipping between her legs to find her already wet through her underwear.

"This," he says, pressing his fingers against her swollen clit. "You want to see if I can make you come harder than I did the previous time I touched you."

Luna's eyes flutter closed as pleasure shoots through her body. When she opens them again, she sees Avery has straddled Caleb's lap on the yoga mat, her hands buried in his hair as she kisses him deeply. The sight should devastate her. Instead, it's the final push she needs to surrender completely.

"Yes," she breathes, turning in Ryder's arms to face him. "That's exactly what I want."

Luna turns in Ryder's arms, pressing her body against his with a boldness she never knew she possessed. Her hands slide up his chest, feeling the hard muscle beneath his shirt as she rises on her tiptoes to meet his mouth.

Across the gym, Caleb pulls Avery closer, his fingers tangling in her blonde hair as their lips crash together. The air in the gym grows thick with desire as both couples surrender to the moment, the pretense of a workout long forgotten.

Ryder's kiss is nothing like Caleb's. Where her husband is gentle, tentative, Ryder devours her mouth with primal hunger. His hands grip her ass, lifting her against him so she can feel the hard ridge of his erection pressing into her stomach. Luna moans into his mouth, shocked by her own response to this man who isn't her husband.

"I know you'll taste sweet," Ryder murmurs against her lips. "I've been thinking about this since the first time I saw you hiding in those baggy clothes."

Luna feels a thrill at the thought that this powerful man desires her. She looks past Ryder to see Caleb watching, and instead of jealousy, there's only heat in his eyes.

Caleb can't look away as another man holds Luna. He should be furious and intervene, but instead, he's aroused watching Ryder's hands on Luna. When Avery's fingers touch him, he gasps but doesn't stop her.

"She's beautiful, isn't she?" Avery whispers in his ear, her hand stroking him slowly. "And look how much she wants him. Just like you want me."

Caleb groans as Avery squeezes his cock through his shorts.

"You like watching her, don't you?" Avery breathes, rocking her hips against his lap. "Seeing your wife with another man, being taken by him."

"This is crazy," he manages to say, even as his hips buck into her hand.

"Crazy good," Avery corrects him, pulling his shirt over his head. "Now touch me like you've been wanting to all night."

Across the gym, Ryder tugs Luna's crop top upward. She raises her arms, allowing him to pull it off and toss it aside. His eyes darken as he takes in her simple sports bra, so different from the fancy lingerie Avery surely wears.

"Perfect," he says, one finger tracing the curve of her breast above the fabric. "You’ve been hiding these beautiful tits under those loose shirts. Criminal.”

Luna blushes but doesn’t cover herself, feeling sexy and desirable. When Ryder pulls down her sports bra, she doesn’t protest as he closes his mouth over a nipple, causing her to moan with her head falling back.

“That’s it,” Ryder encourages between hungry kisses to her breast. “Let me hear how much you like it.”

His hand slides inside her leggings, his fingers finding her soaked panties.

“Fuck, you’re drenched,” he growls, pushing the fabric aside to slide two thick fingers into her vulva. “Your pussy’s begging for this.”

Luna whimpers, spreading her legs wider to give him better access. She’s never been this wet, this desperate. Her eyes find Caleb again.

Avery has pushed him down onto a yoga mat and is straddling his lap, grinding against him as she removes her sports bra to reveal her perfect breasts that Luna can’t help but envy.

Ryder follows her gaze. “Look at your husband, Luna. Look how hard he is for her. Does that make you jealous? Or does it turn you on?”

“Both,” Luna admits, gasping as Ryder curls his fingers inside her, making her cry out, her body arching into his hand. “God, don’t stop—”

“I wasn’t planning on it,” Ryder snarls, his lips pressing fiercely against her throat, his tongue darting over her salty skin like a predator tasting its prey.

"Oh, God," Luna gasps, her body arching with every thrust of Ryder's fingers, relentless and deep, as his thumb expertly teases and circles her clit with a tantalizing precision that sends waves of ecstasy coursing through her.

Luna grips his biceps with a fierce desperation, her nails carving into his skin. She is beyond caring who might be watching; the world around her has faded into insignificance. Her need to reach that peak is overwhelming, and when the wave finally surges through her, it is uncontrollable. A powerful, primal scream tears from her throat, “God, I’m gonna come!”

"Then come for me," Ryder growls, his hand working her with the ruthless discipline of a man who never stops halfway.

Luna bucks against him, every muscle tensing as her orgasm hits with the force of a black hole, stealing the breath from her lungs until all that escapes is a high, keening cry that reverberates off the steel rafters. Her legs fold, and her body sags into Ryder’s arms, leaving her with the dizzying, forbidden pleasure coursing through her veins.

Yet, amidst the euphoria, a pang of guilt surges within her—this is the second time in her marriage that a man who isn’t her husband has made her come.

The thought scares her, and she almost stops herself until she sees Caleb’s face twisted in pleasure as Avery rides him, her golden hair flying, her breasts bouncing. It is so intimate and feral that Luna can’t look away. It is her husband, yet it isn’t—completely undone by Avery’s voice and body.

Ryder catches her reaction and grins while withdrawing his hand from her pants.

"Don’t feel bad," he whispers, his breath hot on her ear. "They’re having a great time."

Luna shudders, a new ache blooming inside her—not just the urge to come again, but to surrender, totally and utterly, to sensation.

Ryder seems to know this, to sense her need. He strips her leggings and underwear with casual force, leaving her bare and exposed to the cool air of the gym.

Luna gasps, instinctively moving to cover herself, but Ryder catches her wrists and pins them gently but firmly behind her back.

"No hiding," he says, his voice velvet and steel. "Not with me."

Luna’s skin prickles as she stands, naked, in the cavernous space of Iron & Desire.

From the mat, Avery turns to watch, her hips still grinding against Caleb, who is now moaning openly as she rides him.

Their eyes meet—four people, pairs and crossed lines, no longer pretending at anything.

Luna doesn’t look away. She lets Ryder guide her backwards until her thighs hit the padded bench of a weight machine.

"I want you bent over this bench," he commands, turning her around. "I want your husband to see exactly what I’m going to do to you."

Luna’s legs tremble as she follows his direction, bending over the weight machine as instructed. Ryder yanks his underwear down, leaving them bunched around his ankles.

"Look at this perfect ass," Ryder says, his palm landing on her right cheek with a sharp slap that makes Luna yelp. "You like that, don’t you? The good girl likes it a little rough."

Luna’s face burns with shame and arousal. She’s never been spanked before, never been spoken to like this. She should be offended, but instead, she pushes her ass back, silently asking for more.

"Fuck yes," Ryder groans, landing another slap on her other cheek. "Your husband’s watching, Luna. He’s seeing how much his proper little wife loves being treated like a slut."

Luna moans deeply, the raw word reverberating through her body like an electric current of pleasure. Her head swivels, and she catches sight of Avery relentlessly grinding against Caleb’s throbbing cock. His face is a canvas of ecstasy, yet his eyes remain fixated on her, burning with an intense gaze as Ryder moves in behind her, poised and ready.

"You want this cock, Luna?" Ryder asks, pressing the thick head of his erection against her entrance. "Tell me you want it. I want your husband to hear you beg for another man's dick."

"Please," Luna whimpers, past caring how desperate she sounds. "I want it. I want you inside me."

Ryder grips her hips and thrusts forward, burying himself in her with one powerful stroke. Luna cries out, clutching the bench as he fills her completely, stretching her in a way Caleb never has. Ryder is bigger, thicker, and he doesn't wait for her to adjust before pulling back and slamming into her again.

"So fucking tight," he grunts, setting a punishing pace. "Your pussy's gripping me like it never wants to let go."

Across the gym, Avery fucks Caleb even harder.

"Watch your wife take my husband's dick," she instructs, bouncing her pussy up and down over his cock now. "Isn't she beautiful like that? All that proper restraint just... shattered."

Caleb can't look away as Ryder pounds into Luna, her face contorted in a pleasure he's never seen before. Her breasts bounce with each thrust, her mouth open in a silent scream.

When their eyes meet, something electric passes between them – a shared transgression, a mutual permission.

"Tell her you love seeing her like this," Avery whispers, rotating her hips in a way that makes Caleb groan. "Tell her how hot she looks taking another man's cock."

"Fuck, Luna," Caleb calls out, his voice strained. "You look so goddamn sexy right now."

Luna's heart pounds at her husband's words. Ryder's cock fills her again and again, his fingers digging into her hips hard enough to bruise. Each thrust pushes her against the padded bench, the friction against her clit bringing her closer to the edge.

"Your husband's enjoying the show," Ryder pants in her ear, reaching around to pinch her nipple. "He loves seeing what a dirty girl you really are. Tell him how good my cock feels in your married pussy."

"So good," Luna cries out, past shame now. "It feels so fucking good, Caleb. I can't... I can't stop."

Avery rises and falls on Caleb's shaft, her perfect body on display as she throws her head back.

"Your wife is taking my husband's cock like she was made for it," she tells Caleb, her voice husky. "And you're so hard inside me. You love this, don't you? Watching her while you fuck me?"

Caleb can only nod, his hands gripping Avery's waist as she rides him. His eyes remain fixed on Luna, on the way Ryder's cock disappears inside her with each thrust. The sight should destroy him, but instead, it pushes him closer to the edge.

"I'm going to come," Luna announces suddenly, her voice high and desperate. "Oh god, I'm coming!"

Ryder slams into her harder, one hand reaching beneath her to rub her clit. "That's it, Luna. Come on my cock while your husband watches. Let him hear you."

Luna's orgasm crashes through her with an intensity she's never experienced. She screams, her inner walls clamping down on Ryder's shaft as waves of pleasure wash over her. Through the haze, she sees Caleb watching, his face twisted in pleasure as Avery grinds against him.

"Fuck, I'm coming too," Caleb groans, his hips bucking upward as he empties himself inside Avery.

Avery screams Caleb's name, her spine arching sharply as she demands every last drop of his release. Her lips curl into a victorious sneer as her own climax crashes over her. She throws her head back, her hips undulating feverishly against Caleb's, her fingers tangled tightly in his hair.

Caleb, still convulsing, looks up at her through a haze of lust and exhaustion, his body splayed out and spent. His chest heaves with ragged breaths as Avery continues to roll her hips, her inner muscles clenching him tightly, refusing to release him from her grasp. She draws out every last shudder of her orgasm, using his body for her own relentless pleasure.

On the other side of the gym, Ryder's thrusts turn brutal, his hips slamming into Luna's with a ferocity that makes her gasp. His breathing is a ragged, animalistic rasp against her ear, sending shivers down her spine.

"You ready for it, Luna?" he snarls, his voice low and menacing. "I'm gonna blow my load deep inside that tight, proper cunt of yours. The cunt that belongs to another man. The cunt that's supposed to be off-limits to me."

He pauses, his cock throbbing inside her, as he savors the taboo of what they're doing.

"You're a married woman, Luna. You're supposed to be faithful, but here you are, with my cock buried deep inside your pussy. And I'm going to come inside you, fill you up with my come, and make you scream while your husband watches.”

His words are a filthy, intoxicating whisper that makes Luna's blood run hot. She can feel his cock swelling inside her, his orgasm building to a crescendo that's going to rip her apart. She's trembling, her legs spread wide as she takes his savage thrusts, her body begging for the release that's about to tear through her.

Ryder's growl turns to a roar as he pounds into her, his cock exploding in a torrent of come that floods her pussy.

"I'm coming inside you, Luna," he bellows, his voice echoing off the walls. "And you're going to take it, every last drop of it."

Luna's scream is a raw, throaty cry that's torn from her very soul, her body convulsing in a wild, uncontrolled orgasm that's driven by Ryder's unrelenting, animalistic passion.

The gym fills with the sounds of their collective pleasure – moans, gasps, the slap of skin against skin, and finally, heavy breathing as they all come down from their high.

Luna slumps forward onto the bench, feeling the weight of Ryder pressing down on her.

On the other side of the room, Avery leans against Caleb's chest, still intimately connected, and murmurs, "I love how you feel inside me."

In the aftermath, reality begins to seep back in. Luna is having sex with another man while her husband watches – and does the same with another woman. The conservative girl from a religious family is shattering every moral boundary she was raised with.

And yet, as her eyes meet Caleb's across the gym, she doesn't see regret or disgust. Instead, a new understanding has emerged between them, a door that can never be closed again.

Ryder's lips gently touch Luna's shoulder as he murmurs, "This is only the start." His member stirs within her, still partially firm, underscoring his statement.

Luna shivers, her body already craving more, her pussy still throbbing with the aftershocks of her orgasm. She knows this is wrong, knows it is sinful, but she doesn't care. She wants more – more of Ryder’s cock, more of Caleb's gaze, more of this forbidden pleasure that makes her feel alive in ways she never thought possible.

"I'm sure we can show your husband exactly how intensely his wife can climax on my cock again," Ryder murmurs, withdrawing momentarily before flipping her onto her back beside the bench.

He then lifts her legs over his shoulders, positioning himself with intent. His cock traces teasingly along the slick line of Luna's pussy lips, each touch electric. He taps her clit with a firm slap, eliciting a sharp gasp from her, then aligns himself once more, pressing the tip insistently against her entrance, poised to plunge deeper.

"You're hungry for it. I can see it in your eyes," he says, loud enough for everyone to hear. "Tell Caleb what you want. What you want him to see."

Luna moans, the words trembling out of her.

"I want you inside me. I want you to fuck me again," she gasps, shame and arousal warring in her voice. Every part of her body burns; every nerve ending is focused on the place where she stretches around Ryder’s cock.

Avery, still straddling Caleb, smirks over her shoulder.

“Good girl,” she purrs, her voice low and sultry, dripping with approval. “I knew you were made for this.”

Her own hips grind down on Caleb’s cock, her tight little cunt milking him as she revels in the sight of Luna’s submission.

Ryder doesn’t hold back; he slams into Luna, burying himself to the hilt in one brutal thrust.

Her arms buckle, her face pressing into the mat as a strangled cry tears from her throat. Her pussy is so wet, her juices slicking his cock as he pulls back and drives into her again, each stroke harder, deeper, more punishing than the last. She can feel every inch of him, the way his thick shaft stretches her open, the way his balls slap against her ass with every thrust.

“Fuck, your pussy is so tight,” Ryder groans, his hands clenching her hips so hard she knows there’ll be bruises tomorrow. He doesn’t care. He’s lost in the heat of her, the way her cunt clenches around him like it’s trying to suck him dry.

“You like that, don’t you? You like being fucked like a little slut.”

Luna can’t answer. Her mind is a haze of pleasure and pain, her body trembling as Ryder fucks her with a ferocity that leaves her breathless. Her nipples are hard little peaks, and she can feel the ache between her legs building, coiling tighter and tighter until she thinks she might explode.

Avery watches with a predatory gleam in her eyes, her hand reaching back to grip Caleb’s thigh as she rides him with slow, deliberate strokes.

“Look at her,” she murmurs, her voice a sultry whisper. “She’s so fucking desperate for it now. She’d do anything for his cock.”

Caleb groans, his hands gripping Avery’s hips as he thrusts up into her, his cock sliding in and out of her slick cunt with a wet, obscene sound.

“You like seeing her like that, don’t you. Your wife being fucked like a little whore.”

Avery’s words cut through Caleb, but instead of anger or disgust, he feels his balls tighten with excitement. He can see the way Luna’s body responds to every punishing thrust, her back arching, her hands clawing at the mat. Ryder is pounding her, showing no mercy, and the sight drives Caleb fucking wild. His cock throbs inside Avery, her walls gripping him, the wet heat of her cunt more intoxicating than anything he’s ever felt.

“Tell me,” Avery orders. “Tell me you like seeing her like this.”

“Yeah,” Caleb manages to say, as his eyes lock on Luna’s trembling form. “Yeah, I fucking love it.”

Ryder doesn’t let up. He fucks Luna like he’s trying to break her, his cock slamming into her over and over until she’s sobbing with pleasure, her pussy clenching around him in tight, rhythmic spasms.

“Come for me, Luna,” he growls, his voice rough with need. “I want to feel you orgasm again.”

Luna can’t hold back. The coil inside her snaps, and she comes with a scream, her body convulsing as wave after wave of pleasure crashes over her. Her pussy clenches around Ryder’s cock, milking him as he fucks her through her orgasm.

"Oh yeah, that's it, come on my cock." Ryder groans, his hips stuttering as he buries himself deep inside her, his cock pulsing into her tight, wet cunt.

Luna whimpers as she feels herself orgasm like never before, her body shuddering with the force of release, every muscle singing with pain and pleasure so intense that for a moment she thinks she might pass out.

Avery moans as she feels Caleb's cock twitch inside her, his own release spilling into her waiting cunt.

"That's it," she purrs, grinding down on him as she milks every last drop from him. "Fuck me, Caleb. Fuck me like you mean it."

Caleb's vision tunnels. Avery's pussy clenches around him, sucking him deeper as she rocks and grinds, her breasts trembling with each movement, sweat beading between them. He can barely hear her words over the slapping and moaning and the animal, desperate sounds coming from his own wife on the mat. But Avery isn't about to let him lose focus.

She grabs his jaw, forcing his gaze to return to Luna.

"That's right. Watch her. Watch him ruin her for you, Caleb."

He groans again, his balls throbbing, his cock pulsing as Avery's cunt milks him. But it isn't jealousy anymore—God, no—it's something darker and hotter and he doesn't have a name for it except want. He wants this. He wants to see Luna shattered with pleasure, wants to see Ryder's cock spearing her, wants to see her face as she comes so hard she cries.

Avery bites his shoulder as her own orgasm crests, a drawn-out cry muffled against his skin. She shudders, her nails digging half-moons into Caleb's hips as her pussy clamps around his cock in pulsing, greedy contractions. He holds her tight, using her as leverage to slam up into her, matching her rhythm, both of them riding out the storm together.

On the mat, Luna is lost in the overwhelming sensations coursing through her body. Each nerve feels electrified, and each touch sends a pulse of pleasure.

As Ryder withdraws, a momentary pang of emptiness washes over her, but a surge of desire quickly replaces it as he lifts her, cradling her against his firm chest. Her legs wrap around him, spreading wide to hover tantalizingly over his rigid shaft, before he presses her firmly against the gym wall, their bodies poised for another intimate encounter.

The cold wall presses against Luna's bare back, startling her from the haze of her orgasm.

Ryder's hands cup the undersides of her thighs, pinning her in place as he lines up at her entrance once more.

Her pussy still flutters from the aftershocks, slick and open to him, and when he thrusts inside again, she nearly sobs with the intensity. It is raw and unfiltered, pleasure at the edge of pain, each stroke a reminder that she is doing something she would have thought impossible a week ago.

He fucks her against the wall, hard and fast, her body jostling with every relentless drive of his hips. Luna's arms flail, then settle around his neck, pulling him tighter until his face is buried in her chest. He bites at her breast, not gently, and she gasps, her own nails scoring angry red lines down his back as she surrenders to the rhythm of their bodies.

Caleb watches, mesmerized and helpless, as his wife is fucked hard against the wall. He cannot decide which image is hotter: Luna's breasts bouncing as Ryder jackhammers into her, or the flushed, almost worshipful look on her face as she clings to the man impaling her.

Avery perches beside him now, stroking his cock with slow, deliberate movements, her mouth close to his ear.

"She's never going to forget this," Avery whispers, teeth nipping his lobe. "Neither will you."

He shakes with need, his cock already hard again despite the load he'd just spent inside Avery minutes ago. Shamelessly, Avery guides him closer, her hand wrapped around his shaft, thumb smearing his own slick over the engorged tip.

Across the room, Luna is reaching another climax already, her cries echoing through the gym as Ryder pistons into her.

His hands leave bruises on her ass, his mouth leaving purple marks on her chest, and even as Luna screams through another orgasm, he keeps going, relentless and hungry. Her head thunks against the wall, her hair wild and tangled, her mouth open in a silent, shuddering gasp as all thought is burned away by the fire in her nerves.

When she manages to open her eyes, Caleb is there, standing just feet away, his cock in Avery's fist. He looks at her with an intensity she'd never seen, and Luna feels herself flush deeper, her clit throbbing as Ryder's cock spears her again and again. Caleb's eyes flick between her pussy stretched wide and her face, and in that moment, Luna knows: her husband is never going to see her as his shy, reserved wife ever again.

"That's it," Ryder encourages, fucking her with punishing precision. "Let him see you fall apart for me, Luna. Show him the real slut you’ve been hiding inside you all along."

She does. Her body convulses, every muscle fiber drawn tight, the world reduced to the wet slap of Ryder's hips against her and the dizzying rush of pleasure as she shatters, again, on his cock.

He grunts, gripping her so tightly the air leaves her lungs, and then he explodes inside her, warmth flooding her core. The release is so intense she sees stars, her vision fading at the edges as she spasms around him.

Avery's hands go faster over Celeb’s cock as he watches his wife come, stroking him to the rhythm of Ryder's last frantic thrusts. She cupped his balls, squeezes, and whispers, "Now, Caleb. Show her. Show her how excited this makes you."

He erupts, hot and thick, his release spurting across Avery’s hand, his vision blurring with the force of it. He barely hears himself groan, barely registers Avery’s satisfied laughter as she milks every last drop from him, her palm smeared with his semen.

On the wall, Luna slides down, legs shaking, collapsing onto the mat. Ryder holds her for a moment, steadying her, his own breath ragged as he presses his forehead to hers.

"Fuck," he gasps, grinning with wild-eyed satisfaction. "That was incredible, Luna."

She giggles, half-hysterical, her body limp and boneless, devoid of shame. Exhaustion and a raw, dizzying pride replace it, as she revels in what she and Ryder have just done, loving every depraved, beautiful second.

Beside her, Caleb's chest rises and falls rapidly, his skin glistening with sweat.

Neither speaks—words can't capture what just happened. She feels the evidence of his release, a reminder of the boundaries she has crossed. Instead of shame, she feels liberated.

Avery and Ryder exchange satisfied glances, their mission clearly accomplished. Avery stretches like a contented cat, her naked body on full display without a hint of self-consciousness. Ryder runs a hand through his dark hair, his muscular body still impressive even in repose.

"Water?" Ryder offers, passing bottles to both Luna and Caleb. His easy manner suggests this is a regular conclusion to his "private training sessions."

Luna's fingers tremble as she takes the bottle, her body still pulsing. She drinks deeply, suddenly aware of her nakedness and the four of them sprawled on the gym mats like survivors of a pleasurable catastrophe.

"You two exceeded our expectations," Avery says, her voice warm with approval.

"We knew you'd be perfect for this the moment we met you," Ryder adds, his hand casually stroking Avery's thigh. "The way you watched each other, the tension between you—we could tell you were curious."

Caleb’s hand finds Luna's, squeezing gently. His thumb traces circles on her palm, a private reassurance.

"We should probably get dressed," he says, his voice hoarse.

Luna nods, suddenly aware of the cool air on her skin. She sits up, wincing slightly at the delicious soreness between her legs, evidence of Ryder's vigorous attention. Her legs feel unsteady as she stands to collect her scattered clothing.

As she pulls on her leggings, she notices Caleb watching her, something new in his gaze—pride, wonder, and lingering desire all mixed together. He steps closer as he pulls on his shorts.

"Are you okay?" he whispers, low enough that only she can hear.

Luna considers the question. Is she okay? She just has sex with another man while watching her husband fuck another woman.

By every standard she was raised with, she should be devastated, wracked with guilt. Instead, she feels... alive.

"Yes," she whispers back, surprised by the certainty in her voice. "Are you?"

"I should feel terrible," he admits. "Watching you with him... I should have been jealous. Angry." He swallows hard. "But it was the most erotic thing I've ever seen."

Heat floods Luna's cheeks. "I felt the same," she confesses. "Seeing you with her—it does something to me. It's like watching a different side of you come alive."

"Different doesn't mean better," Caleb says quickly. "Just... new."

Across the room, Avery and Ryder have finished dressing. They approach with the confident stride of predators who've made a successful hunt.

"So," Avery says, her hand trailing up Caleb's arm. "So another private lesson next week?"

Luna's eyes meet Caleb's. This is the moment where they could retreat, label this a one-time experiment never to be repeated. Return to their safe, predictable life.

"We'd like that," Luna says before Caleb can respond, surprising herself with her boldness.

Caleb's eyebrows raise slightly, but his lips curve into a smile. "Definitely," he agrees.

Ryder's hand settles on the small of Luna's back, warm and possessive.

"We have a hot tub at our place," he says. "Much more comfortable than gym mats."

"And a king-sized bed," Avery adds with a wink. "Plenty of room for... creative arrangements."

The implication hangs in the air—this is just the beginning of what they could explore together.

"We'll text you the time," Avery says, leaning in to place a lingering kiss on Luna's cheek, then Caleb's. Her lips brush the corner of his mouth, a promise of more to come.

Ryder's goodbye is equally intimate, his hand squeezing Luna's ass as he kisses her forehead.

"Think about what you want to try next time," he murmurs.

As they walk to their car, Luna's body is humming with residual pleasure and new anticipation.

"Next time," Luna repeats Ryder's words, testing how those words feel on her tongue.

Caleb opens the car door for her but pauses before she gets in. In the dim glow of the parking lot lights, his face is shadowed but intent.

"Are we really doing this?" he asks.

Luna thinks about why they should say no—their upbringing, values, and possible complications. But then she recalls the thrill of watching Avery with her husband and the power of Ryder's touch.

"I want this," she says simply. "I want to see where it goes."

Relief and excitement flash across Caleb's face. He pulls her against him, his kiss deep and claiming, reminding her that beneath the new dynamic, they still belong to each other.

"Then let's see where it goes," he says against her lips.

As they drive home, Luna watches the familiar streets, which now seem altered, as if the world has shifted. Their conservative past fades with each mile.

Caleb's hand finds hers across the console. "What are you thinking?" he asks.

Luna turns to him, a smile playing at her lips. "That I can't wait for next week."

His answering grin told her everything she needed to know. Whatever happens next, they'd discovered it together.