Part 3

The streetlights flickered past us in a rhythmic, hypnotic blur.

Colin had one hand on the wheel and the other rested on the center console.

He let out a long breath. He sounded… I don't know. Relieved? Amused?

"Okay," he said. He glanced at me, then in the rearview. "Serious question. Did we just get kicked out of a VIP lounge? Or was that a mutual decision to leave before I got arrested for public indecency?"

I snorted. The tension in my chest finally cracked.

"Mutual decision," I said. "Definitely mutual."

"Good," he chuckled. "Because Tank looked like he was about five seconds away from calling the cops. Or joining in. I couldn't tell."

"He was totally jealous," Madison piped up from the back. Her voice was stronger now. Less wrecked. "I saw him watching us leave. He looked like he wanted to cry."

Colin shook his head and tapped his fingers on the steering wheel.

"You two," he sighed. But he was smiling. "I turn my back for five minutes to get drinks. Five minutes. And I come back to… whatever that was."

"You loved it," I challenged him. I poked his arm. "Don't even pretend."

"Oh, I loved it," he admitted easily. "But Jesus, Mia. My heart rate is still about a hundred and eighty. You gotta warn a guy before you start unzipping my pants in public."

He caught Madison’s eye in the mirror.

"You doing okay back there, Mads?" he asked. His voice was genuine. "We went pretty hard. You good?"

"I'm good," she said. "I'm really good, Colin. Seriously."

"Okay. Just checking." He looked back at the road. "No regrets. That's the rule tonight, right Mia?"

"No regrets," I agreed.

The car went quiet for a second. But it wasn't awkward. It was buzzing. We were all replaying it. I could feel it.

"You know," I whispered, looking back at Madison. "I can't get it out of my head."

"What?" she asked.

"You… saving it for me," I continued. "Holding it in your mouth. Waiting. God."

Madison let out a little moan. She shifted in the back seat. I could hear the leather creak.

"It was so warm," she whispered. "I could feel it coating my tongue. I just… I wanted you to taste him too. I wanted us to share it."

"It was so hot," I told her. "Kissing you... tasting his warm cum sliding between our tongues? Feeling it drip down our chins? It was the hottest thing I’ve ever done."

Colin groaned. "Yeah," he rasped. "Watching you two swap my load? Fuck. That was… I don't even have a word for it."

"I felt like such a slut," she whispered. "Just holding his load for you like that. Passing it to you. And I liked it."

"You looked like a slut," Colin said. He didn't say it mean. He said it like it was the highest compliment in the world. "You both looked so fucking hot."

Madison shivered. "I loved it. I loved feeling used like that."

"I know you did," he said. "I watched you. I watched you roll your eyes back and take it. And then I watched you feed it to Mia."

Just hearing him say it. Describing it like that. I felt it right between my legs.

The car went quiet for a beat. Just the hum of the tires. But I could feel Madison shifting behind me. Thinking.

Madison leaned forward, resting her chin on the back of my seat. Right near my shoulder.

"Hey," she said, touching my shoulder. "Mia. For real though."

I looked at her. "What?"

"You're good, right?" She searched my face. "Like... no weirdness? He's your guy. He's your stepbrother. I just... I don't want to ruin anything. I don't want you getting jealous or weirded out."

I reached back and covered her hand with mine. I squeezed it.

"Mads," I said firmly. "I'm not jealous. Watching him with you? Watching you take him? It didn't make me jealous." I bit my lip. "It made me wet."

Madison let out a breath she’d been holding. She grinned. "Okay. Good. Just checking. Because I really, really want to do it again."

"We're going to do a lot more than that," Colin promised from the driver's seat.

I looked at Colin. I looked at his hands on the wheel. His profile. The way his jeans were tight against his thigh. I remembered how he felt inside me. His fingers. His size. And we hadn't even fucked yet. Not really.

I couldn't wait. We were five minutes away from the apartment, and I felt like I was going to explode.

"Colin," I said. My voice was pleading.

He glanced over, and the second he saw the look on my face, he knew exactly what it meant

"Yeah, baby?"

"Drive faster," I told him. "I need your cock. Now."

He grinned.

"Copy that."

He put his foot down, and the engine roared. The truck surged forward, eating up the pavement.

Madison’s apartment was on the third floor. No elevator.

Colin took the stairs two at a time. I was practically jogging to keep up, my hand gripped tight in his. Madison was right behind us, her heels clicking on the concrete steps.

We got to 3B. Madison fumbled with her keys. Her hands were shaking so hard that she dropped them.

"Here," Colin said. He didn't sound impatient. Just calm. He picked up the keys and unlocked the door.

We tumbled inside, the air smelling sweet, like vanilla candles. It was quiet too, just the low hum of the refrigerator coming from the kitchen filling the silence.

Colin shut the door. He threw the deadbolt. Click.

That sound… it echoed. It shut out the world. The club, the drive, the questions about our parents… it was all locked out.

I turned to look at him.

And I didn't wait. I just couldn’t.

I crossed the small entryway in two steps and slammed my body against his. I got up on my tiptoes and cupped his face, pulling him down, and pressing my lips against his.

He groaned, a low vibration against my mouth, but he kissed me back instantly. His hands found my waist, pulling me flush against his body.

I broke the kiss, breathless, and went for his shirt. My hands were shaking a little, fumbling with the hem. I shoved it up. He lifted his arms, helping me, and I yanked the black t-shirt over his head and threw it somewhere behind me.

"Fuck," I whispered. I reached out, running my palm down his stomach. His skin was hot. Hard as rock. I was practically drooling. "You are so fucking hot."

I stepped back just one step, my chest heaving so hard I could feel my nipples pressing tight against the fabric of my dress.

I looked at Madison.

"Unzip me," I told her.

She was already there, standing right behind me, and I hadn't even heard her move. Her fingers found the zipper at the back of my tiny black dress, and she pulled it down slowly.

Then she grabbed the bottom and pulled it up and over my head. The fabric scraped against my skin, and then I was just… naked.

Standing there in just my heels and a tiny black thong.

Colin's eyes went dark. They raked over me. From my small, perky tits to the curve of my tiny waist. Down to my hips.

"Fuck," he said. He sounded reverent. "You're fucking perfect."

I felt a flush heat my skin under his stare.

Then I felt hands on me.

Madison's hands came around from behind me. She grabbed my breasts and squeezed firmly, pushing my small tits up, offering them to him.

I gasped. My head fell back against her shoulder.

"She is," Madison whispered in my ear. Her breath was hot on my neck. "Look at her, Colin. Look how pretty your little sister is for you, how much she wants you."

Colin didn't move. He just watched Madison’s hands kneading my breasts. The bulge in his jeans jerked.

"Tell him," she whispered to me. "Tell him what you want, Mia. Beg him."

"I want it," I whimpered.

"Want what?" Madison coached, squeezing my nipples hard. "Say it."

I bit my lip, letting the filth spill out.

"I want my brother's cock," I begged, my voice trembling but loud. "I need it deep in my tight pussy. Please Colin, I’ll take every inch you give me."

That did it.

The word brother. It snapped the last thread of restraint he had.

He reached out and grabbed my arm. He spun me around. My world blurred for a second, and then, wham.

He slammed me right up against the front door.

My palms hit the wood with a slap. I braced myself, spreading my arms out wide, pressing my hands flat against the surface. I arched my back, shoving my ass out. Offering it to him.

I heard the rustle of fabric behind me and then his hands were on my hips.

He hooked his fingers into the sides of my black thong and yanked it down. I lifted one foot, then the other, kicking them away.

Now I was naked. Pressed against the cold door. With him hot and heavy behind me.

I felt the head of his cock press against my slit. It was hot. Velvety. And so big. He rubbed the tip up and down, coating himself in my juices. He rocked his hips, teasing my clit with every pass.

"Fuck," he hissed. "You are so fucking wet, Mia. You're dripping for me."

"Tell me again," he growled.

"I need it," I panted, looking back at him. "Please, Colin. I want my big brother’s cock back where it fucking belongs. I want you to stretch my tight pussy open and use me."

He pushed.

Oh fuck. He pushed in slow. So fucking slow. I felt my pussy stretch around him, opening up for his thickness. He kept pushing, feeding inch after inch into me, and I could feel every single one.

"Oh my god, Colin!" I moaned. My forehead pressed against the door. "Oh fuck, you're so big."

"Mmm, fuck such a tight cunt. Tight around my cock. This perfect pussy is mine," he grunted.

He kept going. Deeper. My pussy was clenching around him, trying to adjust. He didn't stop. He just kept that steady, relentless pressure until I felt his hips press flush against my ass.

He was in. All the way. Balls deep.

I felt so fucking full, just stretched to my absolute limit. He felt incredible, and I was wrapped so tight around his cock that I could actually feel his pulse throbbing inside me.

Madison moved closer. I saw her shadow on the wall. She was touching herself, watching us. I heard the wet, sticky sound of her fingers working her clit

"Look at her," she breathed. "She's stuffed full of your cock, Colin. Your little sister is so full."

Then he started to fuck me.

He pulled back. Slowly. Dragging every inch of that thick cock through my tight cunt until he was almost gone. I gasped at the loss. I felt empty for a split second.

Then, bam.

He slammed his hips forward. Buried himself to the hilt again.

"Fuck," I moaned, my head banging lightly against the door.

Then he found his rhythm. He was pounding into me. Pulling out, then snapping his hips forward. Slap. Slap. Slap. The sound of his skin hitting my ass echoed in the quiet apartment.

"Yes, that’s it baby, fuck my cunt," I moaned. "As hard as you want. I'll take everything you give me."

I heard a sound behind us, so I turned my head and saw Madison on her knees.

She'd stripped off her dress while I wasn't looking. She was naked, her legs spread wide, two fingers buried in her pussy. Her eyes were glued to where Colin's cock was stretching me open.

"That's it," she panted. "Take that big cock, Mia. Look at him burying it balls deep in your pretty pussy."

Colin groaned. He reached down and smacked my ass.

"You like that?" he growled. "You like taking your brother's cock, huh? Who owns this fucking cunt?"

"Ahh… Fuck, you do, Colin!" I moaned, bucking my hips back, meeting his every thrust. “I love being your dirty little sister! Fuck me! Use your fucktoy!"

"Show me how much you love it and cum for me," he ordered. He sped up. Harder. Faster. Hitting that spot deep inside me over and over.

Madison leaned in. She looked desperate.

"Do it, Mia," she whispered. "I want to taste it. I want to taste your sweet cum all over his cock. Now be a good girl and cum.”

I could feel it building, a hot, heavy pressure that tightened with every single thrust. It was building so fast I couldn't even breathe. The fantasy was taking over, pushing me right to the edge. Madison on her knees with her mouth wide open, just waiting for him to pull out and feed her his cock. The thought of him sliding into her throat all coated in my cum… fuck.

He thrust harder and faster. The sound of our skin slapping echoed in the apartment. My tits bounced against the door and my fingers clawed at the wood.

"Colin," I whimpered. "I'm gonna... I'm gonna cum."

"Do it," he commanded. "Cum on my cock, baby. Cum like a good little slut."

My legs gave out. If he wasn't holding my hips, I would have collapsed. My pussy squeezed down on him, spasming violently. I was sobbing and whimpering. Just a fucking mess, my whole body shaking as the orgasm ripped through me.

"Oh god! Colin. "Fuck! I'm cumming! I'm cumming so hard for you!"

"That's it, baby," he groaned, grinding his hips to meet my spasms. “Squeeze my cock."

I felt him pull out, that thick cock leaving me empty, and I almost cried at the loss.

But then I heard Madison. A desperate sound.

I managed to turn my head. She was right there, on her knees, mouth open wide, tongue out. Waiting.

"Take it," he said. "All of it."

He pushed forward. Her lips stretched around him. He didn't stop. He kept going, sliding that whole length down her throat until her nose was pressed against his stomach.

Her eyes watered and she gagged, but she didn't pull back.

He held her there. Both hands on her head now. And he started doing these small, short thrusts. Just fucking her mouth while keeping his cock buried in her throat.

"Good girl. Just like that."

Madison's throat worked around him. Swallowing. Taking it.

I was still leaning against the door, my pussy twitching from the aftershocks. Watching this. Watching my best friend take my stepbrother's cock down her throat, tasting me on him.

"Holy fuck," I breathed.

Her eyes locked on mine, and she looked beautiful. Used. Her mascara was already starting to run.

Colin pulled back slowly. His cock popped free from her mouth, trailing spit. Madison gasped for air, breathing hard and drooling.

He didn't give me a second to breathe.

He spun me around so fast I gasped. Suddenly, my back was off the door, and I was facing him.

He grabbed my ass and lifted me up. Just like that. Like, I weighed absolutely nothing.

And then he dropped me. Right on this cock.

"Oh, Fuck yes!" I screamed.

He buried himself in my tight hole. Deeper than before. Because of the angle… fuck. He was hitting something deep inside me. Something that made my toes curl.

He used his strength to lift me up a few inches, then slammed me back down. Over and over. Impaling me on his cock. I was just holding on for dear life, my face buried in his neck. “Oh fuck, your cock feels so good, so fucking deep in me.”

"Fuck," he grunted, his grip on my ass tightening. "I'm close. I'm fucking close, Mia."

"Do it," Madison’s voice came from below us. She was still on her knees. Watching. "Do it, Colin."

She crawled closer. She looked up at him, her eyes wild. Evil.

"Do you want to pump your cum into your little sister's unprotected pussy?" she taunted. "She's not on anything, Colin. That little slut isn't on birth control. She's wide open for you."

Colin froze. Just for a split second.

He pulled back to look at me. His green eyes locked onto mine. Searching. Asking.

My heart was hammering against my ribs. It was everything I’d ever fantasized about. Being his, completely.

I looked at him. I let him see it all. The need. The love.

"Please, Colin. I love you so much. Don’t pull out. I want your cum inside me. I need it."

Madison crawled closer. She put a hand on his thigh.

"Fucking do it," she commanded.

That was it. He lost it. He slammed me down and jerked his hips up, forcing his cock as deep as possible. Nestled right up against my womb.

"FUCK!"

He exploded.

I felt it instantly. A jet of hot, thick cum hitting my cervix. Hitting my womb. He jerked, his hips snapping forward, pumping it deep inside me.

"Yes," I sobbed. "Yes, Colin, yes."

The feeling... it was overwhelming. The sheer heat of his cum filling me up, stretching me out from the inside. It triggered me. I clamped down on him, my pussy spasming wildly, milking him as he unloaded.

I came so hard I saw white. My head fell back, hitting the door, while he just kept pumping.

Rope after rope. He was emptying himself into me.

"That's it," Madison hissed from below. I felt her hand cup his heavy balls, massaging them gently, squeezing the last drops out of him. "Yes... Yes, breed that slut. Fill her up, Colin. Breed her."

Colin was grunting, his hips making these tiny, involuntary jerks, emptying himself completely inside me. I was a whimpering, sobbing mess, completely overwhelmed.

He was panting, his forehead pressed against the door next to mine. Finally, he pulled back. He looked at me. His eyes were glazed, totally wasted.

"I..." he started, but he couldn't even finish the sentence.

Madison stood up slowly and put a hand on his arm.

God, she was stunning. A total wreck. And I couldn't stop staring.

Her dark hair was a wild, tangled mess around her cute face, and her skin was absolutely glowing, slick with sweat that made her golden tan shine. I watched her perky tits rise and fall with her heavy breathing, my eyes tracing that dip in her tiny waist down to the perfect, round curve of her ass.

"Come on," she whispered gently. "Let’s go to the bedroom.”

She took his hand, and he let her lead him. I was still wrapped around him, his cock softening but...