A Collection of Taboo Step-Sibling Desires

1. Prologue

The late-afternoon sun slanted through the half-drawn blinds of the living room, painting long amber bars across the beige carpet that still smelled faintly of new-install freshness and someone else’s old dog. Dust motes drifted in the light like slow ash, catching briefly before vanishing again. From the kitchen came the low metallic clink of champagne flutes being rinsed, the occasional soft laugh of the newlyweds, and the rhythmic scrape of a sponge against glass. The house was trying very hard to feel like home.

He stood at the foot of the stairs, one hand resting on the smooth oak banister that had been polished so many times the grain felt almost liquid under his fingertips. His thumb traced an invisible circle there, over and over, the same small compulsive motion he’d used since he was twelve whenever his pulse ticked up for no reason he could name.

She came down the stairs barefoot.

The hem of her pale sundress brushed the tops of her thighs with each step; the fabric was thin enough that the light behind her haloed the faint outline of lace panties underneath—simple white cotton, nothing extravagant, yet the sight lodged somewhere behind his sternum like a swallowed stone. Her hair, still damp from the shower she’d taken after the small backyard ceremony, clung in dark spirals to the nape of her neck. A single droplet slid from the wet ends, traveled the shallow valley of her collarbone, and disappeared beneath the scooped neckline.

She paused on the third step from the bottom.

Their eyes met.

Neither of them spoke.

The refrigerator in the kitchen kicked on with a soft compressor hum; ice cubes shifted inside the freezer tray with a crystalline rattle. Somewhere upstairs a ceiling fan clicked once, twice, then settled into its lazy metronome. Outside, a lawnmower two houses down droned into life and then faded again, leaving only the scent of cut grass drifting through the open window screens.

Her bare toes curled against the stair tread—once, twice—small knuckles whitening. The motion lifted the hem another half-inch; he felt his throat close around nothing. She didn’t fix the dress. Instead she tilted her head, the smallest fraction, so that one damp curl slid forward and clung to the corner of her mouth. She didn’t brush it away.

He realized his grip on the banister had tightened enough that the wood creaked under his palm.

She took the last three steps in one slow, deliberate glide, stopping close enough that he could smell the coconut leave-in conditioner she always used and something warmer underneath it—her skin, sun-heated, faintly salty from the August afternoon. Her breathing was shallow; he could see the quick flutter beneath the thin cotton over her ribs.

“You’re staring,” she said. Her voice was barely above the refrigerator hum, but it carried every decibel of awareness.

His jaw muscle jumped once. He forced his eyes up from the shadowed dip between her breasts to her face. Her pupils were wide in the dim hallway light; the green of her irises looked almost black. A faint flush had started at her throat and was creeping upward, petal by petal.

“I’m not—” he started, then stopped because the lie tasted metallic.

She gave the tiniest smile—not triumphant, not mocking. Something softer. Something that made the stone behind his sternum twist.

Her right hand lifted. Slowly. The fingertips brushed the inside of his wrist where his pulse hammered against the skin. She didn’t grab; she simply rested there, cool from the air-conditioning vents, while heat radiated off him in waves. The contact lasted three heartbeats—four—then she drew her hand back, letting her nails graze the faint blue vein that ran along the inside of his forearm.

The touch left a trail of gooseflesh that raced all the way to his shoulder.

She stepped sideways, past him, close enough that the back of her hand brushed the front of his jeans for half a second. Accidental. Or not. He couldn’t tell anymore.

She didn’t look back as she walked toward the kitchen.

He stayed rooted at the bottom of the stairs, listening to the soft slap of her bare feet on tile, to the sudden bright peal of her laugh when her mother said something about the leftover cake. He listened to the clink of plates being stacked, to the low murmur of adult voices discussing honeymoon plans in Bora Bora, to the ceiling fan upstairs clicking again like a clock that refused to stop counting.

His fingers were still curled around the banister. When he finally let go, the wood held the warm imprint of his palm for several long seconds.

Later that night the house settled differently.

The newlyweds had retired to the master bedroom on the first floor; their door clicked shut at 11:17 with the soft, satisfied sound of a lock turning. Upstairs, two bedroom doors stood at opposite ends of the hallway like sentinels. Between them stretched twelve feet of carpeted silence and the faint glow of a night-light left burning in the bathroom.

He lay on his back in the dark, sheets kicked to the foot of the bed because the air felt too thick to breathe under cotton. The ceiling fan spun above him, stirring the same warm air over and over. Every few minutes a car passed on the street outside; headlights swept across his walls in slow white arcs, painting the posters and the cluttered desk and the half-open closet in momentary daylight.

Across the hall, her door opened.

The hinges gave the smallest, oiled sigh.

Bare feet on carpet—slow, deliberate. A pause outside his door. He could almost feel the shift in air pressure when she leaned close to the wood, listening. His own breathing turned shallow, careful, as though any sound might shatter whatever this was.

The knob turned.

She slipped inside without turning on the light.

Moonlight from the window behind his bed caught the edge of her oversized sleep shirt—soft gray cotton that fell to mid-thigh. No bra. The faint peaks of her nipples pressed against the fabric when she inhaled. Her hair was dry now, loose and wild around her shoulders. She smelled of mint toothpaste and the same coconut conditioner.

She closed the door behind her with both hands, palms flat against the wood, as though bracing herself.

Neither of them moved for what felt like minutes.

Then she crossed the room—seven steps—and stopped beside his bed. The mattress dipped when she sat on the very edge; the springs gave a quiet protest. Moonlight silvered the curve of her bare knee where the shirt had ridden up.

She looked down at him.

He looked up at her.

Her lips parted; no sound came out at first. She swallowed once, throat working visibly.

“I couldn’t sleep,” she whispered.

He didn’t answer. He couldn’t. His tongue felt thick and useless.

She lifted one hand. Hesitated. Then let her fingertips rest feather-light against the center of his chest, right over his heart. The cotton of his T-shirt was no barrier; he felt every ridge of her fingerprint, every tiny tremor in her touch.

His heart slammed once—hard—against her palm.

She felt it.

Her eyes fluttered closed for a second. When they opened again they were glassy, pupils swallowing the green.

“I know we’re not supposed to,” she said, so quietly the words barely stirred the air between them. “I know.”

Her fingers curled, gathering a small fistful of his shirt.

“But I keep thinking about the way you looked at me on the stairs today.” Her voice cracked on the last word. “And I can’t stop.”

She leaned forward—slowly, giving him every chance to pull away.

He didn’t.

Her hair fell around them like a curtain, blocking out the moonlight, trapping only their shared heat and breath. Her mouth hovered an inch above his.

The ceiling fan clicked once above them.

Somewhere downstairs a clock chimed midnight.

In the dark between one heartbeat and the next, the rules they had both pretended to obey simply ceased to exist.

1. 1
   Leopard Salute Dare

The bedroom door stood ajar by perhaps three inches—just enough for the hallway night-light to spill a narrow wedge of warm amber across the hardwood floor. He had meant only to pass by on his way to the kitchen for water. The house at 1:14 a.m. was otherwise silent except for the distant tick of the grandfather clock downstairs and the occasional pop of settling floor joists in the cooling August night.

He paused because he heard music—very low, bass-heavy, leaking from earbuds that had slipped halfway out of her ears. The rhythm was slow, deliberate, almost a pulse. Curiosity—or something heavier—nudged his bare foot forward until the door eased open another fraction under the pressure of his fingertips. The hinges made no sound; he had oiled them himself two weeks earlier after she complained about the squeak waking her mother.

Inside, the only light came from the string of fairy lights draped over her headboard—tiny golden orbs that turned the white walls into a constellation of soft freckles. The air smelled of vanilla candle wax that had burned down to a shallow pool hours ago, now hardened into translucent ridges, and beneath it the faint coconut of her body lotion, warmer now from skin heat.

She stood in the center of the room, three steps from the full-length mirror propped against the closet door.

Her back was mostly to him, but the mirror gave him everything.

Long pink hair spilled in a high ponytail that swayed like a metronome when she shifted her weight. The ends brushed the small of her back, just above where black garter straps bisected the smooth curve of her ass. Leopard print—pink spots on black satin—clung to her like spilled ink. The bra cups were pushed up and together by underwires that dug faint red crescents into the tops of her breasts; a fat black satin bow sat between them like an exclamation point. Matching panties ...