The alarm wakes me up with its excessive buzzing at 5:35am. I groan and push my head under the pillow while my husband gets up for the thrice weekly 6am 5km run part of his mid-life crisis.

I hear the front door slam and his car start up and drive off down the gravel drive. Why he doesn’t get up fifteen minutes earlier and run the kilometre or so to where he meets his fellow runners, I don’t know. I asked him once and he told me that wasn’t the point. I’ve never seen the point of running, let alone running in the dark, but each to their own. At least it gives me an hour of peace and silence in bed before he gets back, and I need to get up, make sure Chloe is up and drop her off at school on my way to work.

I’m just drifting back to sleep again, snatching that precious extra hour of sleep, when I hear our bedroom door open. I feel the mattress sag as someone kneels on it, and I open my eyes and am about to scream when I feel a hand over my mouth.

“Sssh, it’s ok, Mummy. It’s just me.”

My eyes adjust to the dim pre-dawn light, and I recognise the silhouette of my sixteen-year-old stepdaughter.

“Chloe, what the hell are you doing?” I finally manage to ask when she removes her hand from my mouth.

“Well, I usually masturbate before I get up, but, well, Daddy woke me up leaving this morning, and I thought, while the cat’s away, so to speak.” She stops talking at this stage and slowly drags a finger over my breasts, pushing down the duvet and tracing my nipples through my nightdress.

“While the cat’s away, the mice will play?” I look at her questioningly.

“Well, maybe that’s not quite the right cliche to use,” she giggles. “But I think you should play with my kitty anyway.”

She swings her knee over me and straddles me. She looks down into my eyes and grins. I glance down to see her smooth pussy in front of me. I can’t help myself. My tongue is out of my mouth and licking my lips in anticipation, and she sees it and giggles.

“You’re such a Pavlovian bitch in heat, Mummy.”

She looks over at the clock. “Do you think you can make me cum faster than Daddy can run 5km?”

I shut my eyes and shudder. This is all so fucking wrong, but I can’t help it. I’m like a moth to a flame. She reaches down with both hands and grips my hair.

“On your marks, get set, go,” she giggles as she presses her smooth, sweet teenage pussy to my mouth.

My tongue laps and licks. My hands reach around and squeeze her ass cheeks, pulling her into me like my life depends on it.

I slurp, lick, swallow and suck as Chloe writhes on top of me. She arches her back in approval when I hit somewhere just right and I am rewarded with a steady dripping of her juices over my face.

When she cums, she is loud. Her little bird-like whimpers turn into full-throated screams of pleasure as she encourages me to fuck her harder.

Finally, she slumps and rolls off me. She lies there, giggling softly as she slowly regains her composure.

“You are so naughty, Mummy.” She props herself up on one elbow and trails a finger up my thigh. I close my eyes. “Please,” I beg. “Please touch me, even if it’s just this once.” I’m still waiting for Chloe to touch me, to pleasure me. The only time I’ve cum was while watching the video she sent me of her masturbating. I am desperate to feel her soft lips on me or her delicate, tiny fingers sliding inside me. But no. I am to be deprived yet again.

She rolls off the bed and stands up. “Daddy will be home in five minutes. You might want to open a window and air the room before he comes back.”

I have an ache between my legs that I really need to take care of but instead, I nod, agree she is right and get out of bed and slide open the curtains. I hear Chloe locking her bathroom door and almost simultaneously, Derek opens the front door.

He thumps up the stairs and claims the shower before I have a chance so I sigh, throw on my dressing gown and head downstairs to make coffee and breakfast.

I almost feel like one of those American moms in the movies who makes a massive spread for breakfast that no one eats. In my world however, I make coffee that Derek drinks while reading his phone. I toast him a couple of slices of white toast, which he may or may not eat and wave him on his way, usually around the same time and Chloe stomps down the stairs in her school uniform.

There is no stomping this morning. Instead, Chloe practically skips into the room with a “good morning, Mummy” before placing the butt plug on the kitchen counter.

“Put this in after you shower.”

No ‘please’, no ‘would you like to?’, just a flat order.

I swallow.

“I don’t think so, Chloe. I’ve a busy day at work.”

“No, you don’t,” Chloe retorts. “You do admin work for a charity. You only work a half day because Daddy always wants you home for when I get back from school. You do not have a busy day Mummy, but don’t worry. I will spice it up for you.”

I stare at her. The old Chloe is gone. The one who never spoke or barely acknowledged my existence. This new Chloe is much more involved in my life, and I’m starting to think maybe I preferred the old one.

“Go shower, and we will discuss it when you get down again.”

I shower quickly. I slide soapy fingers over my newly smooth pussy and gasp at how sensitive it all feels. My fingers seem to glide, and I lean back and luxuriate in the pleasure until Chloe bangs on the bathroom door.

“Stop fingering your wizened old cunt and hurry up or I’ll be late for school.”

I slam the water off and towel myself dry. I put on my usual work attire. A nice blouse and skirt, not bothering with tights as it’s been such nice weather lately.

Chloe is standing in the kitchen waiting for me. Her fingers drum impatiently on the worktop.

“Over here, Mummy.”

I falter, momentarily wondering if it is worth pleading before admitting defeat and take a step closer. Chloe pats the worktop.

“Lean down and push your ass out, Mummy. Slide your panties down.”

She picks up the plug and the tube of anal glide and squirts a liberal amount over the shiny silver plug. I grip the waistband of my pretty teal panties and push them down my thighs.

“Spread your ass cheeks, Mummy.”

I screw my eyes shut, but obediently flip my dress up and reach around and spread my ample cheeks for my dominating stepdaughter.

I gasp at the cold when she slowly shoves the butt plug into my tight, almost virgin ass. She gives my ass a swift spank when she is finished, then grips my hips and turns me around. She reaches for my knickers and pulls them up almost tenderly. She pats my mound through the silky fabric then reaches into her school blazer pocket and withdraws the pantie vibrator.

She slips it in, her fingers stroke my aching, needy clit before manoeuvring the vibe into place. The magnet clicks, holding the vibe in place.

She pulls the skirt down and smooths it into place while I stand, plugged, vibed, her plaything.

“Let’s go, Mummy.” She bends down, picks up her schoolbag and heads out the door.

I watch her go. Her ass sways in the regulation school skirt with the over-the-knee socks, the vans and her hair in pigtails. She looks like a million other schoolgirls, and only I know the sexual deviancy pulsing through her veins.

When I get into the car, she is sitting on her phone. She barely glances up but immediately I feel a buzz in my pussy, and she turns on the vibe. I grip the steering wheel and breathe heavily through my nose. I know to acknowledge her will result in her upping the ante, so I try to ignore it. I slowly put the car in gear and drive off.

Once we exit the drive, she turns the vibe down to nothing, and I slowly begin to relax and concentrate on driving. At the traffic lights, with the lights on red, she flicks the vibe back into life, and I jolt with the unexpected shock. Despite my resolve from earlier, I turn to her.

“For fuck’s sake, Chloe. You’re going to make me crash.”

She just stares back, almost pityingly and rolls her eyes.

“The car is stopped, Mother.”

Once the light turns green, the vibe stops, and somehow, we make it to school without causing an accident.

“How long will it take you to get to work, Mummy?” she asks as I pull up.

“About ten minutes or so.”

“I’ll give you twelve, then the vibe goes on full. You better hope you are in a bathroom stall when I turn the vibe on.” She stares at me as I stare back, my mouth open.

“You can send me a selfie of you in the stall so I know you’ve made it.”

“Chloe, this is nuts.”

“Tick tick, Mummy.” She points at her watch as she gets out of the car. “11 minutes, 57 seconds…. 56 ..”

I see her grinning through the rearview mirror as I drive off, suddenly very anxious indeed to get to work on time.

Every traffic light, every slow driver taking their time to turn into a turn off, every lollipop lady, they all conspire to stop me getting to work on time. Despite the fear of being forced to orgasm in my car if I don’t get to work on time, the excitement and adrenaline is making my pussy drip. I watch the numerals change on the car clock. It’s ten minutes since I dropped Chloe off by the time I pull into the car park at my work.

I grab my handbag and as quickly as possible, given I’ve a butt plug up my ass, I make my way to the ladies' bathrooms on the ground floor. I barge into the communal sink area. There are four stalls, all with the doors open. I breathe a sigh of relief that the room is empty and quickly go into the furthest stall from the door and lock the door. With trembling hands, I take a selfie and just as I hit send, the vibe erupts in my knickers.

My pussy spasms as the vibrations pulse directly on my clit. I’m leaning back against the door, letting the sensations wash over me. My hands paw at my tits through my blouse. The fact that I have no control over this is terrifying and so incredibly arousing at the same time. That my sixteen-year-old stepdaughter is the one in control is equally terrifying.

My legs are trembling, I sit on the toilet seat, my hand over my mouth, trying to stifle the screams threatening to erupt from my throat. The orgasm washes over me, causing me to spasm and jerk. My brain slowly turns to mush. The vibe doesn’t stop. I grip the handrail. I hear the door open and someone go into another stall. I hear the rustle of clothes. I hear them pee, rearrange themselves, wash their hands and leave the room. All the while, the vibrations assault my clit and another orgasm builds.

I fall off the toilet seat and kneel on my hands and knees on the toilet floor. A text arrives from Chloe. Having fun?

With trembling fingers, I attempt to reply. Whatever I sent makes no sense and another orgasm crashes over me. I writhe spasmodically on the toilet floor. Shameless. Finally, the vibe cuts out, and I lie there, drained and exhausted.

Finally, I lift myself off the floor and attempt to clean myself up. My knickers are soaked. I grab some toilet tissue and wipe the streaks of cum that had begun to run down my thighs. I step out of the stall and check myself in the mirror. At least there is no wet patch on my skirt. I splash cold water on my face, reapply some makeup and make it to work only a few minutes late.

Every forty minutes, I get a burst of vibrations in my knickers. I realise Chloe is sneaking onto her phone as she walks between one classroom and the next. My new worry now is if her phone gets confiscated with the vibe on and I’m left with a vibrating clit massager until the batteries run out, or the teacher notices and I get called in for Chloe having a vibrator app on her phone.

I shudder and panic at the same time. Fortunately, neither of these seems to occur, and I get to lunch time without being forced to orgasm at my desk, though it is questionable how much work I actually get done.

The drive home is uneventful, and I breathe a sigh of relief as I unpeel the sodden knickers and remove the butt plug from my ass. Only working part-time certainly has its benefits, I think to myself as I clean myself up properly. I can feel the faintest stubble growing around my mound as I lie on my bed and spend a pleasant twenty minutes just stroking my stubbly pussy.

I changed into tee shirt and leggings after my lie on the bed, and now I’m kneeling on the kitchen floor, cleaning out one of the larder cupboards, when I hear the front door slam. This is followed by a school bag being dumped in the hallway, shoes being kicked off and then I hear feet padding into the kitchen. They stop, so I call out, “Afternoon, Chloe. How was school?”

She walks over behind me and drags her stockinged foot up my inner thigh. Her foot moves all the way up my leg and traces the crease of my ass.

“It was fun. How was your day?”

“You mean apart from someone making me cum in my knickers? It was ok.”

I hear a snort and a giggle and jerk my head up, banging it off the cupboard shelf.

I crawl out backwards and turn, rubbing my head in an attempt to dull the pain and realise in shock that Chloe isn’t alone. Standing beside her with her hand over her mouth, trying to stifle the giggles is Chloe’s friend Ashley.

Fuck!