I don’t sleep well that night. I sleep fitfully. The image of Derek’s face on Chloe’s phone screen, watching me as Chloe’s friend fucks me and calls me a dirty fucking whore fills my dreams.

And then Chloe’s announcement that her plan all along was to make her Dad realise I was a cheating whore so he’d dump me and go back to Chloe’s mother. I lie there in the dark, waiting for the dawn, still not believing how vindictive and conniving she could be.

Admittedly, it was partly my fault. She had caught me with my hand in my knickers, masturbating as I sniffed her soiled cum stained panties I’d found in the laundry basket. From there, it had been a hedonistic helter-skelter ride into depravity as she’d made me buy her clothes and underwear. Despite myself, I touch myself as I lie in bed, remembering how I watched her undress in the changing room. How I saw her shaven smooth snatch and little boobs. How she’d dragged her toe along my slit and massaged my clit. And then how she’d taken me to a sex shop. I blush in the darkness at how the sales assistant mistook me for her older girlfriend before helping Chloe buy vibrators, dildos and butt plugs.

She had shaven my pubic hair and let me shave hers. I’ve watched her masturbate to orgasm, and she’s used my face countless times to pleasure her. Yet in all that time, she has never touched me or pleasured me. She’s told me often enough that I was nothing but her fucktoy. She’d taken my anal virginity after making me wear a butt plug to work. She and her friend had taken turns to fuck me with a strap-on, and the final indignity had been when she’d whored me out, getting her friend to bring a man around to fuck me. And then I discovered that she had done all that only because she wanted to capture it on video to show Derek.

I’d thrown Chloe out of the bedroom, slamming and locking the door behind her. I could hear her laughing with her friend, Ashley and Ashley’s maybe-boyfriend, Jacob. The sounds of drinking and over-enthusiastic sex radiated from her bedroom until, finally, Ashley and Jacob left.

I’d tried calling Derek, but it just went to voicemail. Finally, I got a terse text. ‘Home tomorrow. Talk then.’

No demand for explanation. I wonder if this is what it is like on Death Row for the condemned woman’s last night.

I must have fallen asleep because the next thing I know is Chloe banging on the door. I groggily open the door and stare open-mouthed as she walks into my bedroom as if nothing had happened.

“Why’s the door locked?”

“Because you tried to ruin my life?” I answer, trying but failing to keep the sarcasm from my voice.

“Shouldn’t you be packing then?”

She steps closer and runs a finger over the swell of my breast. My nipple hardens, as if on autopilot and pokes through my nightie.

“Or do you want a goodbye fuck first?”

“You mean be used like a walking dildo, only there to get you off?”

“Didn’t you like it?” She looks almost put out.

“I did,” I admit. “But I would have liked more. I would have liked at least a little reciprocation.”

“Aww, Mummy,” She simpers. “You should have said. I’d have happily gone down on you any time.”

I watch, dumbfounded as she slides down onto her knees in front of me. Her hands caressing my thighs.

I groan. Fuck, I’m so conflicted. She has been the mega bitch and ruined my life, and yet, when I see her kneeling, with those soft, delicate fingers sliding up my thighs and brushing my shaven mound, my resolve weakens. She gazes up at me with the biggest puppy dog eyes.

I hold my breath as she leans in and kisses my mound. Her touch is so delicate. Her fingers glide and caress as her tongue flickers out. My knees buckle. She takes my hips and guides me to sit on the edge of the bed.

I spread my legs for her. I spread for my teenage stepdaughter. I’m such a slut, I think to myself as I succumb to the temptation. Chloe licks and laps eagerly. She rolls her face in my pussy as she pushes her tongue inside me. It feels like nothing on earth. I arch my hips, thrusting my needy, dripping pussy into her waiting mouth. Her fingers squeeze and grip my ass as she drinks me in.

We are so caught up in the moment that we don’t realise Derek has come home. The slam of the door makes us both look up.

Derek is standing by the now closed bedroom door. He drops the overnight shoulder bag without breaking eye contact.

“So this is what’s been going on while I’ve been away.” It’s not a question, and Chloe and I remain motionless.

He slowly walks across the bedroom and grabs the chair, the one I usually use to drape clothes over that I’ve worn but can still wear again before I wash them. He plonks the chair by the side of the bed.

“Sit!”

Immediately, Chloe springs up and sits on the hard, white wooden chair. She is wearing a little white tee shirt with the ‘Go to Jail’ square from the Monopoly board emblazoned on the front. Appropriate, given the circumstances, I think.

I sit on the bed, my legs still spread open. I miss Chloe’s tongue already.

“So this is the whore?”

I look up, but his gaze is directed at Chloe. She blushes. She looks uncomfortable now that reality has hit us both like a train. I’ve never seen Derek like this. His usual jovial nature has been replaced by a cold, aggressive demeanour. It might be my imagination, but he seems as cross with Chloe as he does with me.

He grabs my hair and tugs hard. “On your hands and knees, whore.”

I scramble, moving to try and ease the pain shooting through the roots of my hair and quickly get into position on the bed. My nightie has ridden up, and the hem hangs around my lower back. Too late, I remember the WHORE marking Chloe had written on my ass yesterday.

Derek runs his fingers over the faded but still visible lipstick markings.

“Did you write this?”

Chloe blushes and nods. “Yes, Daddy.”

“Before or after she fucked that man in my bed?”

Chloe blushes even more. She wraps her fingers together, as if praying with invisible rosary beads, before finally admitting, “Before, Daddy.”

“And how did you know she was a whore before you caught her with your friend’s boyfriend? Or do you think I’m a complete idiot?”

I glance up, watching in amazement as Chloe stares open-mouthed. Her mouth opens and closes like a goldfish as she tries to form the words to deny it.

Eventually, Derek puts her out of her misery.

“I think you’ve known for a while your stepmummy is a whore, haven't you?”

“Yes, daddy,” she nods.

She swallows as Derek unbuckles his belt. I hear his trousers fall to his ankles. I glance in the dressing table mirror and watch as he spits on his hand, then slowly wanks his cock. I'm wet already from Chloe's attentions, and now I can feel myself drip.

Chloe stares, frozen to the spot as he positions himself behind me. He reaches forward and grabs my hair. He tugs hard, snapping my head back so I’m forced to lock eyes with Chloe. Her mouth is open. She is frozen in shock as her Daddy talks to her in a way she’s never heard him speak before.

The cute, cuddly Daddy is gone. He’s like a different man. He slams his cock into me. I’m forced forward, my mouth open in shock, and I cry out. He pulls out, then slams in again. He fucks me hard as Chloe watches.

It all feels so wrong, but the whole situation is turning me on. As he slams his cock into me, I watch Chloe’s reaction. She bites her bottom lip. Her nipples swell under her top and poke through. She squirms a little on the hard wooden chair. I realise with a start that Chloe is getting turned on watching her Daddy fuck me.

The rhythmic slap of Derek’s hips against my arse echoes around the room.

“I think you’re as big a slut as your stepmother, Chloe.” I watch her raise her eyes to stare at her Daddy. "When I'm finished with her, you’re going to suck my cum out of her, understood?”

She blushes. She opens her mouth to protest, but then stops. A grin appears on her face, and she spreads her legs. I can see a damp patch on her pink panties, and I know Derek can see it too.

"Yes, Daddy," she whispers.

He starts to fuck me harder. He slams his cock in deeper, forcing a grunt from me. He takes me deeper, harder and faster.

Chloe slides the pad of her middle finger over the damp patch. She catches my eye and grins her malevolent grin as she rubs her clit in front of us.

She pants as she pleasures herself while her father fucks me in front of her.

This is so so wrong, I think. But after everything that has happened in the last week, does it really matter any more?

“Is your stepmother enjoying this?” he asks as he slams his cock into me. Chloe grins and nods. “Yes, Daddy,” she whispers. “The dirty whore is enjoying it.”

“Come here, Chloe.” He orders without breaking the rhythm as he fills my soaking wet pussy. She stands and moves behind me. I glance in the mirror. I watch Derek take his daughter’s hand and guide it to his big, heavy balls. She squeezes them. Her thumb strokes his testicles as he fucks me hard and deep.

“That’s it, baby girl,” he moans. “Fuck, your hand feel so good when you squeeze Daddy’s balls.”

He turns and locks eyes with her. "Daddy has wanted this for ever such a long time."

Derek’s fingers grip my hips. He pulls me onto his cock and holds me there as he slams into me one last time, then holds me there. He spurts… once… twice.. three times. He holds me there as Chloe leans in and kisses him hard and aggressively on the mouth.

“Fuck, you really are a whore,” he gasps when she finally breaks the kiss. I have no idea if he is talking to me or to her.

He pulls out, and almost immediately, Chloe drops to her knees and clamps her mouth to my still spasming cunt. She laps vigorously. Her tongue swirls as she pushes it inside me, trying to scoop as much of Derek’s cum as possible onto her greedy tongue. She licks and sucks and tongue fucks me as I kneel on the bed.

She is like a woman possessed. She spreads my arse cheeks and presses her tongue in deeper, trying to lick every drop of Derek’s cum onto her teenage tongue.

My orgasm builds as she pleasures me. It feels so good for my step-daughter to finally lick me to orgasm. I press my ass back onto her face, letting her lick my cum filled pussy. Derek watches, his cock not softening fully. The sight of his daughter tongue fucking his wife turns him on as well. Chloe doesn’t stop when I start to cum. She licks and slurps her way through my earth-shattering orgasm.

Finally, I collapse back onto the bed, and Chloe kneels above me, looking triumphant.

“Good girl,” Derek whispers. He reaches over and wraps his fingers through Chloe’s long, dark hair. With a tug, he pulls her face down to his cock.

“You need to clean me too.”

Chloe nods. “Yes, Daddy.”

She kneels on the bedroom floor and swallows her Daddy’s big, hard cock. I watch father and daughter as Derek stands with his eyes closed. Whatever remnant of right and wrong evaporates as his sultry, slutty teenage daughter swirls her tongue around the head of his cock. Her fingers caress his balls as she slurps and sucks and drools over him.

“I want your cock, Daddy,” she begs as she runs her tongue along his shaft. “I want you inside me,” she pleads. "I want you to fill me with your cum the same way you filled her."

The little slut lets her Daddy’s cock plop out of her mouth. She leans back and pulls her top off, letting him see her beautiful little boobs. Her pink nipples are rock hard, and Derek practically salivates as his eyes roam over her naked form.

“On the bed, “ he pants breathlessly. Chloe scampers up and lies on our bed. She spreads her legs and waits for her Daddy to claim her. I reach down and stroke her hair. Her eyes flick up at me, and she smiles. Her hand grabs mine as Derek positions himself between her legs.

I squeeze her hand as her father impregnates her. I’ve no idea what is going to happen afterwards, but for now, our family is still together.