It’s Saturday morning. My husband is going through another one of his mid-life crises. I’ve lost track but I think he is cycling today. He headed off at the crack of dawn all dolled up in lycra and I’m now lying awake relieving the events of yesterday afternoon when my step-daughter caught me sniffing her panties.

What happened next was something I’d fantasised more times than enough in the darkest recesses of my mind. But for her to make me lick her til she came on my face and I tasted her cum. Well that was something else.

My hand has slipped under the covers and inside my pj bottoms while I’m reliving the memory. My eyes are closed and the sensations produced by my middle finger painting my juices over my clit are pulsing to my core.

I can’t have heard the bedroom door open because the next thing I know is my step-daughter, Chloe, is bouncing on top of me announcing that it’s time to get up.

I open my eyes in shock. She is excitedly bouncing on the bed, wearing a long white tee shirt bedshirt thing and I catch glimpses of blue hello Kitty panties.

“Oh, Chloe,” I sigh. “It’s Saturday. Can’t you let me have a lie in?”

“No,’ she pouts. “You promised.”

“Promised?” I ask, confused. “What did I promise?”

“You promised we’d go shopping. I told you I needed new stuff?”

“But Chloe, you don’t need all that stuff. It’ll be your birthday soon.”

She leans forward. The neck of the tee shirt is rather baggy and I get a glimpse of her pert teenage breasts swaying which does nothing to help me negotiate with her.

“But I was such a good girl yesterday.”

“Yeah,” I snap, ”A proper Snow White.”

“Exactly,” She scowls. “And you’re the wicked step-mother.” She grins at how clever she’s just been before continuing. “And if you don’t want Daddy to find out what you did to his Princess, then I think you should get up.”

I freeze. No one can ever know what we did. I’m not sure if it is technically illegal to do it with your step-daughter, but having raised her since she was six, she may as well be my own flesh and blood.

She pulls the covers off me and there is a momentary silence as she looks at my hand in my pj bottoms.

“Do you ever stop wanking?”

I blush and pull my hand out.

“Look, what happened yesterday, Chloe, it was wrong.”

“I know, Mummy. So so wrong. But it’s ok. It can be our secret.”

She straddles me, sitting on my stomach and places her hands on my shoulders. I can feel the heat between her legs on my belly and all I can do is agree with her that it is so so wrong but I can’t say No.

She slowly rubs herself against me, undulating her hips back and forth as she looks at me and begs in a whiny voice. “You promised, Mummy and I will be ever such a good girl for you.”

Her panties rub against me as she slowly humps me like I was her pillow. I arch my back, pressing up and she smirks when she looks down at me, pleased with how easily I succumb to her..

“Right, get up then.”

She swings her leg over and climbs off the bed, giving me a perfect view of her pantie-clad ass.

An hour later, I’m standing waiting for her. Much against my better judgement, and realising I was now being blackmailed by my step-daughter, I’d agreed to take her shopping.

She skips down the stairs looking a picture of innocence in her black hoodie and white skater skirt. She slips on her trainers and bounds out the door like an excited puppy and gets in the car.

I get in, check she’s got her seat belt on, then reverse out of the drive and head into town. I park in the multi-story car park and join the throngs of Saturday shoppers. I’m always reminded of that film, Day of the Dead where the zombies wander around the American shopping mall on days like this. She skips past her usual haunts - Primark and New Look and instead drags me into one of the more upmarket boutiques.

She turns and smiles at me. “I think I need something more grown up, Mummy.”

She skips up and down the rows of dresses and tops, picking up items here and discarding them there. I browse casually, glancing up every now and then, watching as she holds a dress up to herself in front of the mirror. She catches me watching her, smiles then places it back on the hanger and moves on.

I think about how much she’s changed in the years I’ve known her. She was a precocious six year old when her father entered my life. I wasn’t proud that I'd broken up her family and I’ve always known she’s resented me. I tried my best to be a good mummy to her but as she became a teenager, she almost blanked me from her life. I realise with a jolt that this is the first time I’ve seen her smile at me in years.

She bounds over with an armful of clothes.

“I know it looks a lot, but honestly, I know some won’t suit me.” She smiles a mischievous smile. “Come on, I’ll need a second opinion.”

Without giving me time to answer, she heads down the corridor lined with changing rooms. The sales woman on duty at the entrance to the changing rooms smiles at me as if to sympathise with me, but probably calculating in her head the commission she’ll get if Chloe buys everything in her hands.

The sales woman pulls the curtain of the changing room aside for Chloe and tells us she’ll be right outside if we need anything else.

“Oh god, I hope not.” I laugh to show I’m joking and she nods and pulls the curtain closed behind us.

It’s a nice airy changing room with good lighting, plenty of mirrors and a small bench for me to sit on. I hang up my coat and smooth down my rather fuddy-duddy looking sundress before sitting down as Chloe hangs up the dresses on the rail.

“What do you think, Mummy?” I look up and admire the sundress she is holding up against her body. It’s blue and white checks with little red cherries dotted around. “It looks very French,” I suggest. She nods in agreement and hangs it on a hook before peeling off her top.

She has turned her back on me so I watch her lift the hoodie over her head. Underneath she’s just wearing a teal green bra, the colour of which really suits her complexion. I glance at the mirrors, seeing the swell of her breasts reflected from all angles.

She catches me looking and smiles. I swallow as she hooks her thumbs in the waistband of the skirt and slides it down over her hips. Her peachy ass is encased in a pair of white cotton panties with pale pink edging.

She pushes her ass back, on purpose I’m sure and gives a playful wiggle to help the skirt fall to her ankles. She steps out of it and kicks off her trainers. She gives a little pirouette as she reaches for the dress and pulls it over her head.

I can feel dampness pooling in my own knickers already. The sight of her stripping down to her underwear in front of me has my head spinning. The little minx knows what she does to me, knows what I am willing to do. Was it only yesterday I knelt on the floor and tasted her orgasm through her panties?

“How do I look, Mummy?” Her question pulls me out of my reverie and I run my eyes over her. It’s pretty and I nod and tell her so. She makes a face and tells me she’s not sure. I watch her pull the dress off and wander around the changing room in her underwear as she rifles through the other dresses she selected.

“How about this one, Mummy?”

I nod. “Well, everyone needs a little black dress, darling.”

She smiles and slips it on. There’s something vaguely puritanical about it in the way it hides her curves, flattening her in an unflattering way and I tell her as much.

She wrinkles up her nose as she reappraises the dress in the light of my comments.

“You’re right, Mummy. I can look much sexier than this”

The dress is discarded and a red dress is next. It’s a bandeau dress and as she goes to put it on, I tell her it will look silly with her bra on and that strapless dresses need a strapless bra.

“Or no bra,” she giggles.

She stands with her back to me and slowly pushes the strap off one shoulder. After pushing down the second strap she leans forward, giving me an eyeful of reflected cleavage. She reaches behind and unclasps the bra. She straightens and turns, facing me as she lowers her hands to reveal her breasts and her marshmallow pink nipples. The nipples are swollen and she almost absent-mindly rolls one between her finger and thumb. She gives a small sigh of pleasure then licks her lips.

I’m sitting open-mouthed. I’ve forgotten to breathe as I watch her. She clicks her fingers at me. “Concentrate, Mummy.”

I give a little whimper of frustration and watch as she pulls up the dress. She reaches behind her then stops and turns her back on me.

“Can you zip me up, please?”

Her eyes bore into me as she watches me in the mirror. I stand and take the couple of steps needed. The dress hangs open. The smooth expanse of her back on display. She locks eyes with me and watches as I reach for the zipper. My hand trembles a little as I step closer, inhaling the scent of her shampoo with a hint of something more primal.

I slowly pull the zip up. The noise seems amplified. My eyes drop and I can see the merest outline of her hard nipples through the red stretch crepe material. The dress is figure hugging, emphasising her curves and in a mother’s opinion at least a couple of inches too short.

She nods in approval at how she looks as she twirls from side to side in front of the mirror.

“Do you think I look sexy, Mummy?”

I blush.

“Umm, well… I mean, that’s not really a question to ask your mother now, is it?”

I step back and sit back down on the bench.

She turns back, smiling to herself, ignoring me as she smooths down the tight fitting fabric. Then she frowns. She grabs her ass and squeezes the fabric.

“You can see my knickers through it.”

“Well it is a bit tight,” I start to say but she ignores me. I watch as she tugs up the dress then slips her hands underneath. She tugs her panties down her thighs and I watch her step out of them. I swallow as I gaze at them, sure that I can see a damp patch in the crotch.

She catches me looking and gives a theatrical cough to attract my attention.

“Ahh hum, Mummy. Does it look better without panties?”

I swallow feeling the blush rise. She has taken a step towards me, gazing down at me as I sit on the bench. I run my eyes down her, over the tight fitting dress. She does another slow pirouette for me to get a closer look at her ass, sans panties. I swallow again and manage to whisper, “yes… yes it does.”

She turns back to face me and beams down at me. I hoped you’d say that.

She puts one foot on the bench between my legs. I look down at her leg and notice the orange nail polish on her toes. She wriggles the toes then slides her foot down my leg and up again, slipping under the hem of my dress. She traces her big toe up my calf and I feel it slide across the back of my knee.

“Lift your dress,” she whispers as her foot slides up my inner thigh. I glance up at her in panic.

“We’re in a changing room. She’s right outside,” I hiss, as quietly as I can.

“Show me,” she whispers, her foot trailing higher. Her touch is sending pulses directly to my core. I glance at her leg. Her knee is raised with her foot on the bench and I can see up her dress and the juices glistening on her shaven pussy lips.

“Show me.” The tone is firmer this time. I try one last time. “Please, Chloe.” But she merely scowls and almost hisses, “Show me now.”

I close my eyes as the shame and embarrassment floods my face. I pull the hem of my dress up and show my teenage step-daughter my knickers. Pale blue panties with a lace bow on the waistband.

“That wasn’t so hard now, was it?”

I slowly shake my head, mesmerised by the sight of her pussy. It’s so wrong, I know it’s so so wrong but I can’t help it. I’ve thought about her for so long. How I’ve wanted to taste her. How yesterday, instead of satiating me, only made the desire stronger. And now, I'm sitting staring at her as she drags her toe over the sodden crotch of my own knickers.

“You’re wet.”

I nod. “So are you,” I manage to whisper.

“You make me want to be naughty, Mummy.”

All the time, her toe drags forward and back over my aching clit.

“Show me, Mummy.” Her eyes drop to stare at my knickers. She nods slightly to emphasise exactly what she wants me to show her. She trails her big toe along my slit one last time before taking a step back.

I don’t even bother trying to protest. It’s gone beyond that. Instead I slide my knickers down my thighs, exposing my hairy bush.

“I knew you wouldn't be groomed,” she sneers. “You never make any effort. Fuck knows what Daddy sees in you.”

She places her foot back on the bench and resumes teasing my clit with her painted toe. I watch her, her leg raised, angled to give me a perfect view of her gorgeous smooth teenage twat as she sends pulses to my core.

She strokes my wet needy aching slit, dragging her toe through my folds. I moan louder. She stops and puts her finger to her lips and glances at the curtain.

I nod and try to control myself as she pushes her toe into me. The little slut is fucking me with her foot. She alternates between massaging my clit and fucking me with her toe. I grip the edge of the bench with my fingers, knuckles going white. I’m so on edge it’s unbelievable. I watch her own pussy peeking out from underneath her dress. Watching the bead form on her lips.

My hips jerk, pressing my pussy onto her, needing her inside me. I’m going to cum. I can feel it.

“Is everything ok in there?”

I go bug-eyed. The sales assistant is right outside the curtains and my step-daughter has her toe in my pussy.

“Yes, we’re fine,” Chloe calls out, as calm as anything. “We’ll be out in a minute. I’m just trying the red dress on one last time.”

We hear the sales assistant walk off to speak to another customer. Chloe lets her foot fall back onto the floor and pulls the dress up over her head, giving me one last gorgeous glimpse of her naked body. She makes sure I’ve got a good look before she slips on her skirt and hoodie.

I stand, pulling up my panties and rearranging myself. My head is spinning.. I chastise myself to get a grip. I almost came in the changing room with people right outside. Chloe bends and scoops up her underwear and presses them into my hand. She slips into her trainers then skips out of the changing room.

I follow like the pack horse. I’m about to hand all the dresses back to the sales assistant when Chloe scoops up the red dress and tells her we are taking this one. I open my mouth to protest but the girl has a sympathetic look on her face.

“They're all the same at that age. Trouble.”

“You can say that again.” I agree as I gaze at my step-daughter browsing the tights collection knowing that I know she has no underwear on and I get a feeling of dread at where she will take me next.

My whole body is on edge. Chloe knows I was so close to cumming in the changing room and I know she is going to up the ante, I just don’t know how. Yet.