My mind is a mess as I start preparing dinner. I can’t believe how close it came to Derek catching me in bed with his sixteen-year-old daughter and her school friend. On top of that, the realisation that he is going away for a few days scares me. I’m beginning to realise just how cold and calculating Chloe is. I’ve also come to realise that she has me right where she wants me. I have no control. I have no say in anything anymore. She can make me do anything. She knows it, I know it, and she knows I know it.

I hear Ashley leaving. I hear Chloe giggling and telling her she’ll message her tomorrow before Chloe goes into the living room and talks with her father. I concentrate on chopping the vegetables and stirring the onions, enjoying the peace and quiet in the kitchen.

A few minutes later, Chloe wanders into the kitchen. She reaches across the kitchen island and plucks a carrot stick from the pile.

“Such a shame Daddy is going away and leaving us all alone.”

She bites into the carrot, and the crunch echoes in the silence as she waits for me to say something. I shrug and eventually concede that it’s only for a few days, and with school and work, we’ll hardly notice he’s gone.

She grins and steps closer. She picks up another carrot stick and drags it over my breast, circling the nipple through the fabric.

“I think it will be very obvious that he is not here.” She stares into my eyes. I gulp and swallow. Predator is the word that springs into my head. “Don’t you think?”

I won't be able to keep the tremor out of my voice, so I don't speak. While my brain is thinking the worst, my pussy is clenching with excitement at what Chloe is planning. Fortunately, Derek decides at that moment to walk into the kitchen to grab a beer while he waits for me to cook dinner. Chloe immediately spins around and asks when he is leaving.

“That eager to get rid of me, are you?” he laughs.

“No Daddy, of course not.” She pouts at him. “I just wondered if I would get to say goodbye to you in the morning.”

“Aww, Princess,” he sighs happily and rubs the top of her head. “You are the most precious thing I could ever wish for. And yes, I’ll see you in the morning. I’m going to go for my run as usual, and then I’ll drop you to school on my way to the airport. How does that sound?”

Chloe simpers like a little girl and tells him that he’s the best, then skips upstairs, saying she’s going to try and get her homework finished before dinner.

The next morning, the bedroom door opens a split second after Derek slams the front door. Chloe is just wearing an orange vest top. She pulls the covers back and climbs on top. She doesn’t even kiss me or acknowledge my presence. She just presses her smooth teenage pussy onto my face and sighs with pleasure as my tongue begins to lick.

Not that I’m complaining. I have come to adore the taste of my stepdaughter’s juices. She has awakened a part of me that I didn’t even know existed, and now I don’t want it to end. I crave her. I crave her body. I crave her smooth, flawless skin and her pert breasts. She has the most delicious ass to squeeze, and her pussy tastes like heaven.

I lick and lap at her, rubbing my nose against her clit as I roll my tongue into a tube and push it inside her. She responds by arching her back and whimpering.

“That’s it, Mummy,” she pants. “You’re such a good little fucktoy.”

My hands squeeze her ass cheeks, pulling her onto me. She never pleasures me like this, but I don’t mind. She’s right. I am her fucktoy.

“Hurry up, Mummy. You don’t want Daddy to walk in and catch you eating out his daughter now, do you?”

I nod my agreement and swirl my tongue inside her. I French kiss her pussy, tongue deep in her, my lips caressing her slit, and my nose on her clit as her little bird-like cries fill the room.

She squeezes her thighs around my face and spasms, cumming all over my face. Her hot, wet, honeyed goodness splatters my cheeks and chin as she shakes, almost violently before collapsing. One hand reaches out to press against the headboard, steadying herself as she slowly comes down from her morning orgasm.

She kneels there for a few minutes, straddling my face. I inhale her scent and slowly slide my tongue out of her and slurp it through her folds.

“You’re such a good girl, Mummy,” she tells me when she finally slides off my face. I lie there, watching as she stands and wanders over to my dressing table. She opens my knicker drawer and rummages through it.

“Wear these today.” She throws something at me. I pick it up off the duvet and see it’s a rather skimpy black thong.

I nod, to which she just replies, “Good,” and leaves the bedroom.

There is something demeaning yet so erotic about being told what knickers to wear. She is taking over every aspect of my life, and with Derek going away, there is going to be no one to keep her in check.

I get up and jump into the shower before Derek gets back and hurriedly slide two fingers inside myself almost as soon as I step under the water. I fuck myself hard and fast. No time for finesse; I chase the orgasms that Chloe deprives me. I long for her touch. I long for her tongue or fingers to pleasure me, but it’s all one way with Chloe. Being taken by the strapon girlcock was as close as it gets. I cum as I relive the memories of yesterday. I shake and slump to the floor remembering my face between Chloe’s legs as Ashley fucked me from behind.

I pull up the thong and am immediately reminded why I hate wearing them. It is uncomfortable, and the string digs into my arse crack. I reach for a pair of tights, then pause. Knowing Chloe will have something planned that demands easy access, I pick up a pair of holdup stockings and pull them on instead. I smooth down the front of my black dress and admire myself in the mirror. Not bad for a woman of forty, I think.

Just then, Derek arrives back, looking hot and sweaty.

“Morning, luv,” he greets me as he heads for the shower, then stops and turns back. “You look lovely.” He leans in and kisses me on the cheek, then is away and into the shower. I blush and touch the area of cheek he kissed. Despite the turmoil of the past week, I do love him. I love him and his cock and straightforward, predictable sex. Then I think of Chloe, and my thighs squeeze together.

Chloe is in the kitchen when I get downstairs. She steps closer and kisses me. She presses her mouth to mine and presses herself against me. Then she breaks the kiss, strokes my face, and tells me that I am to collect her from school when I finish work. She hands me her school diary, and I sign the permission slip for her to leave school at lunchtime.

“Where are we going?”

“You’ll find out.”

With Derek taking Chloe to school, I decide to head off early. Being around Chloe makes me do silly things, and some space from her seems a good idea.

I feel almost empty driving to work without a plug in my ass or a vibe in my knickers, and find it hard to concentrate on anything that is discussed in the team meeting. My thoughts keep going back to Chloe and Ashley. Ashley’s red curls and sweet pussy. Chloe and Ashley are lying, kissing on Chloe’s bed. Ashley and Chloe taking turns fucking me with the strapon Chloe bought with my money.

I pull up outside the school gates and wait for Chloe to leisurely stroll down the path from the school entrance to the car park. She slips into the passenger seat and hands me the knickers vibe.

“Chloe,” I protest. “We’re right outside your school.”

She shrugs, looks around theatrically, then tells me no one is watching. Through gritted teeth and a muttered, “for fuck's sake,” I undo my seat belt and shove the vibe inside my thong. As I pull up my dress, I see Chloe smirk when she sees my stockings. She runs her fingers along my thigh, and I swear, it’s like electricity coursing through me.

“Mmmm, I do like the stockings, Mummy. They make you look so slutty.”

As the magnet clicks to hold the knicker vibe in place, Chloe gives a short buzz at full blast to check it's working. The way my hands snatch to grip the steering wheel gives her all the evidence she needs, so she swipes the vibe off and tells me to take her to the shopping centre.

We walk through the arcade, looking more like mother and daughter than on the last trip here. I catch sight of ourselves reflected in shop windows; Chloe in her school uniform, me in my black office dress and cream coat.

She takes me into Boots and heads to the makeup counter. She runs her fingers along the tubes before pulling out a couple of different shades.

“Show me your wrist,” she demands, and I meekly pull up my coat sleeve. She draws a red line across my forearm with both lipsticks

“I like this colour best,” she decides. I glance at the dark red lipstick smears on my pale skin then at the lipstick tube.

“Opinionated. That figures,” I say, smiling at her.

She moves along the aisles, dropping eyeliner pencils, eye shadow, brushes, primer, foundation, concealer, blusher, highlighter, and god knows what else into the basket.

She stops at the perfume counter, and I open my mouth to protest, but a glance from her cuts me short. She chooses a bottle of Miss Dior and just giggles when I see the price tag. I reach out and place a hand on her arm.

“Chloe. I think you’ve got enough there.”

She gives me such a look of contempt that I immediately withdraw my arm.

She turns and flounces to the checkout without a word and waits for me to follow and pay for it all.

Once outside the shop, she thanks me and gives a kiss on the cheek. She takes my hand and we walk hand in hand along the concourse until we reach Davie’s Pet World.

She looks into the shop through the large plate glass window.

“Now Mummy, you are going to go into the shop and choose a collar that will fit around your neck. You can choose the colour.” She turns to gauge my reaction, which, as she expects, is one of horror. “Then you will take it to the counter and ask for an engraved tag to go with the collar.”

My mind whirls as I can scarcely believe what she tells me next.

“You will ask them to engrave ‘Good Girl’ on one side and ‘Dirty Whore’ on the other.”

I grip her arm. “Please, Chloe. This is going too far.”

“Do you want to be a good girl, Mummy?” She pauses. “Or would you rather be a dirty whore?”

My cheeks flush red. I feel my heart racing. That is insane. She is insane.

“I’ll be watching,” she says, and then she enters the shop.

I stand motionless, unable to make my feet move from the spot. I can see two men behind the counter. The thought of having to ask them to engrave a dog collar with ‘Dirty Whore’ makes me feel physically sick. I can see Chloe browsing the dog collars, probably mentally picturing me wearing one already. With a sigh of resignation, I push open the door and enter the shop.

Chloe sees me enter and moves away to look at dog leads while I run my fingers over the collars. Determined to get this over with as quickly as possible, I pick the nearest one. A plain black one with a silver ring. Glancing around to check no one is watching, I bring the collar up and wrap it around my neck to check it fits.

The vibrator springs to life inside my knickers. I give a jolt and squeeze my legs together, squirming slightly as the pulses intensify. Then it stops. Satisfied that it will fit, I hesitantly walk to the counter.

“Yes, madam, how can I help you?”

I open my mouth to speak, but the vibe starts again. I gasp in shock, and the man looks concerned before I manage to control myself and say I need a dog tag engraved. He nods and lays out three different designs on the countertop. I pick the plain silver disc and ask will he engrave different things on both sides. He tells me normally it's the dog’s name on one side and contact info on the other.

The vibe starts again, and I clutch the edge of the countertop as I attempt to control myself.

“What’s the dog’s name?”

I blush and stammer, fighting the sensations the vibe is producing as it pulses against my clit. Finally, Chloe stops it and I can breathe.

“Can you put ‘Good Girl’ on one side?” I watch the man raise an eyebrow then go, “mmhmm,” and carefully write the words on a piece of paper. I swallow, then, wanting this over with, blurt out, “And can you put ‘Dirty Whore” on the other side?”

He freezes, his pen poised above the sheet of paper. He looks at me, then down at the collar, then back up.

“All block capitals or would you prefer cursive script?”

“Block capitals, please.”

He nods, exchanges a look with his colleague, who is staring at us, and turns to the engraving machine. The screech of the engraving machine covers the moan I make when Chloe turns the vibe on once more. Her finger swoops up and down the phone screen, varying the length and intensity of the pulses shooting through me. I’m edging and trying desperately not to cum while waiting for my Dirty Whore dog tag.

As the man finishes, Chloe stops the vibe, and I watch her approach the counter. She stands behind me, pretending to be just another customer, but with a perfect view of the two men who are grinning as the older man slides the dog tag onto the counter.

“Do you want me to attach the tag to the collar?”

“Please,” I nod, wishing a hole would open up under my feet and swallow me up.

I watch him attach the tag, place the collar in a paper bag, then take the money from my proffered hand. Without waiting for the change, I turn and leave the shop as quickly as possible.

Chloe follows a few minutes later, also carrying a paper bag and grinning the biggest shit-eating grin.

“Oh Mummy, you should have heard what those two men were saying about you after you left. I’m almost tempted to make you go back in wearing it.”

“Can we please go home?” I beg. “I’ll do anything.”

Chloe pauses.

“Really? Anything?”

I nod.

“Anything is a very big word, Mummy.”

“I don’t care. Just don’t make me do that again.” I can feel tears well up. Tears of shame, yes, but I’m now scared where this will end up.

Chloe is quiet on the drive home. She sits and stares out the window. I try to engage her in normal mother-daughter conversation, but she just gives me monosyllabic answers. It is only when I park the car in the drive that she seems to perk up and smiles at me.

“Let’s get inside then, Mummy.”

She goes ahead of me and uses her key to open the front door. I can see her standing waiting in the glass-fronted porch, and I follow her in and close the door.

“Give me your coat, Mummy.”

I smile and strip off my coat. Her tone is a little brusque, but it is only when she tells me to take off my dress too that I realise she’s not being helpful.

I glance out the porch windows. I can see cars going past in the street at the end of the drive.

“It’s a little public, Chloe.”

“I said to take your dress off, Mummy.”

I stare at the young woman in front of me. I don’t recognise her anymore. This dominant woman controls me. She makes me want to please her, and I want her to be pleased with me.

I nod. “Yes, dear,” I whisper.

I unzip the dress and let it fall. I pick it up and hand it to Chloe as well.

“Bra and knickers too. You can leave the holdups on.”

I stand naked in the porch, exposed for all the world to see. Chloe reaches into the bag from the pet shop and pulls out the collar. She smiles as she traces the engraving.

“Do you want to be a good girl or a dirty whore, Mummy?”

“A good girl,” I whisper.

She nods and arranges the collar so the good girl tag side is facing out, then moves behind me. She presses her body against my back as she places the collar around my neck. I can feel it tighten before she fastens the buckle to keep it in place.

“On your knees.”

I obediently drop and kneel on the cold tiles. I watch her pull a dog lead from the other bag and close my eyes in shame. She fastens the lead to the collar and then gives a tug. “Crawl, Mummy.”

With another swift tug, she makes me crawl naked through the house to the kitchen.

“Sit,” she commands, and when I kneel, my ass pressing back on my heels, she rubs my hair and tells me I’m a good girl. “Stay,” she orders, and I watch as she quickly runs up the stairs.

She is back a minute later with the plug in one hand and the lube in the other.

“Face down, arse up.”

I position myself as requested and whimper at the coldness of the...