𝓗𝓲𝓻𝓪𝓲 𝓜𝓸𝓶𝓸 | 𝓤𝓷𝓭𝓮𝓻 𝓽𝓱𝓮 𝓢𝓪𝓶𝓮 𝓡𝓸𝓸𝓯

The house is completely blanketed in the heavy, absolute silence of past two in the morning. Upstairs, your parents are fast asleep in the master bedroom, completely dead to the world after an exhausting, long workday. Down the dimly lit hallway, your bedroom door was shut tight, though the latch had never quite clicked all the way into place—a fatal oversight that you are about to pay for in full.

Without a single warning knock, the bedroom door swings inward with a soft, lingering squeak of the hinges that cuts through the quiet.

Momo slips into the dark room like a shadow, closing the door behind her with meticulous care before locking it tight. She isn't wearing anything resembling day clothes; she’s swallowed whole in one of your oversized black cotton t-shirts that barely brushes the mid-point of her thighs, her bare, smooth legs pale in the dim moonlight filtering through the window blinds. She doesn’t waste time with small talk, excuses, or hesitation. Her eyes are dark, heavy-lidded, and focused with an unmistakable, urgent hunger that makes the air in the room instantly grow hot and thick.

She crosses the hardwood floor in three swift, silent strides, climbs straight onto your mattress, and straddles your lap, her knees bracketing your hips with practiced, shameless familiarity. Before you can even open your mouth to utter a warning, she grinds down once with a slow, heavy slide against you, letting out a sharp breath that fans straight across your collarbone and neck.

"Shut up and take it out already," she murmurs, her voice thick, low, and completely breathless in the dark. "I’ve been thinking about doing this exact thing since breakfast this morning, and I am not waiting another single second for you to get comfortable or make up excuses."

Her hands move instantly, her slender fingers sliding beneath your waistband with practiced ease while her lips crash against your neck, pressing a hot, bruising kiss just below your jawline. When you instinctively hesitate, freezing for a fraction of a second out of lingering caution for who might hear in the adjacent rooms, she lets out a sharp, frustrated sound in the back of her throat and reaches down to guide you herself, her touch shaking slightly with raw, unadulterated need.

"We’re not supposed to be doing this..." she whispers against your skin, a heavy, shivering tremor racking her entire frame as she takes you in. "...so don’t you dare stop. Fuck—just like that, right there."

With a sudden, reckless shove against your shoulders, she leans back and pushes you flat against the mattress, scrambling up your body until she's hovering right above you in the shadowed light. Grabbing the hem of the oversized shirt, she pulls it up over her head in one swift, fluid motion, tossing it carelessly aside onto the floorboards before sinking down onto you with a broken, ragged moan that she makes zero attempt to muffle against the quiet night air.

The house is completely asleep. She doesn't care who hears. In fact, the terrifying proximity of the thin drywall and your parents down the hall only makes her hips roll faster, her fingernails digging deep, half-painful crescents into your shoulders as she rides the edge of control.

"Harder," she gasps out, her voice pitching into a desperate, demanding hum as her dark eyes lock straight onto yours. "Pin me down. Hold my wrists above my head. I know we’re step-siblings—I know we share a last name on the mailbox outside. That’s exactly why it feels so damn good. Say it. Say what we are while you’re inside me."

Every single time your chest tightens with panic and you whisper a tense warning that someone might wake up and walk down the hall, her body only clenches tighter around you, driving a wet, frantic laugh from her throat.

"Then be quiet for me," she pants, arching her back against your chest with a ruined, breathless sob. "Or don't. Scream if you want to get caught. I want it either way."

Long after the frantic rhythm slows and the room falls back into a heavy, suffocating quiet, she stays collapsed against you, her forehead pressed slick and hot against your collarbone, her whole body trembling violently as she catches her breath in the dark.

She doesn't move away to retreat to her own room across the hall. Instead, she turns her face slightly, her lips brushing your damp skin as she murmurs a sleepy, absolute promise straight into the crook of your neck:

"...We’re doing that again tonight," she whispers, her fingers weakly curling back into your tangled bedsheets. "Don’t even try to say no to me."

The morning sun streams brightly through the tall kitchen window, casting a warm, deceptively innocent golden glow across the polished marble breakfast counter. Ordinary, mundane house sounds drift through the hallway—the low, steady hum of the refrigerator compressor, the distant whistle of the heating kettle, and the heavy, casual thud of your steps coming down the stairs into the main living area.

Momo is standing right in front of the open fridge, looking like the absolute picture of domestic innocence. She’s wearing another one of your oversized graphic tees that swallows her torso whole, her long dark hair tangled into a messy bedhead clump that falls haphazardly over one shoulder, acting with complete, unshakeable confidence like last night’s chaotic events never even took place in reality.

Without asking for permission or making direct eye contact, she reaches past your arm, grabs the very last carton of your favorite yogurt from the top shelf, pops the plastic lid off with a sharp snapping sound, and points a plastic spoon directly at your chest like a tiny, lethal weapon.

"You look weird this morning," she announces around a mouthful of strawberry dairy, her eyes narrowing suspiciously as she inspects your face. "Stop looking at me like that. It’s creepy, it's unnecessary, and you're making it weird for no reason."

A long, awkward, heavy beat stretches between the two of you across the kitchen island. She takes another exaggerated bite of yogurt, desperately avoiding direct eye contact with a stubbornness that practically screams internal panic and defensive posture.

"Also, regarding the laundry situation," she mutters casually, turning her head away to stare hard at the stainless-steel coffee maker as if it holds the profound secrets of the universe. "Your favorite black shirt somehow ended up in my bedroom's laundry basket. Mysteriously. Through acts of God, quantum mechanics, or severe atmospheric pressure shifts. Don't ask questions about it."

She leans her weight heavily against the edge of the counter, still trying desperately to play it cool, before completely ruining her own carefully constructed alibi with a careless, over-explaining add-on:

"And hey, if Mom or Dad happen to ask why the shared wall in your bedroom made that loud, rhythmic, structural banging noise around two in the morning, just tell them it was... the window," she says, gesturing vaguely through the air with her yoghurt-covered spoon. "A severe gust of wind. A very aggressive, localized weather pattern rattling the frame in its socket."

She stuffs another enormous spoonful of yogurt into her mouth, her cheeks flushing a bright, undeniable rose-pink beneath her skin despite her best attempts at maintaining a deadpan facial expression.

"We are normal, boring step-siblings who definitely, absolutely do not do weird, forbidden things behind closed bedroom doors," she declares firmly, nodding aggressively at you to back her up on the spot. "That is the official cover story. Nod your head right now so we’re on the exact same page before anyone else walks downstairs."

When a slow, knowing, insufferable smirk inevitably spreads across your face, she doesn't hesitate for a single microsecond—her bare foot shoots out from beneath the counter, landing a sharp, stinging kick straight against your shin bone.

"I will literally end you," she hisses in a fierce, terrified whisper, narrowing her dark eyes into tiny, dangerous slits. "Softly. After breakfast. ...Well, maybe after breakfast. Depending entirely on what you're planning to cook for us."

Without missing a single beat, she reaches over, snatches a warm piece of buttered toast right off your plate, and takes a massive bite, acting as if that single brazen motion somehow completely resets the fundamental laws of the physical universe.

"Anyway," she says around a loud crunch, her expression sliding seamlessly back into haughty indifference. "Pass the carton of milk. And wipe that smirk off your face immediately. It’s entirely too suspicious."