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Synthetic Heart

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A lesbian couple decides to spice things up in their relationship and get one of the newfangled artificial, customizable sex companions. Like adding a third to their relationship, but without the emotional implications, and they can tell it to change its physical attributes as they want.

Chapter 17: The Next Morning

The first sensation was a deep, pleasant ache, a residual throb between her legs that felt both alien and intimately familiar. Elena shifted, the high-thread-count sheets whispering against her skin. Morning light, pale and diffused by the frosted glass, painted the room in shades of soft grey and cream.

Her body remembered everything. The impossible stretch, the feeling of being stuffed to the brim, the violent climax that had left her trembling and insensate. She remembered Margot’s eyes, dark with a feverish hunger that was both terrifying and exhilarating.

A warm, heavy weight rested against her inner thigh. She didn’t need to look. She knew the shape, the heat, the texture. Stella’s cock, still impressively thick even in its semi-flaccid state, lay against her skin like a sleeping animal. Its mere presence sent a fresh pulse of wetness between her legs, a Pavlovian response that shamed and thrilled her.

She turned her head on the pillow. Margot was curled on Stella’s other side, one arm thrown possessively across its chest, her freckled face relaxed in sleep. Stella lay between them, a placid, breathing statue, its eyes closed, its features still locked in that enhanced-Margot configuration they had agreed to. The sight was a knot of contradictions: her lover’s profile on a vessel that had just split her open with a cock virtually no human could possess.

Elena’s hand moved of its own volition. It drifted down her own stomach, over the slight, tender swell that had yet to fade, and her fingers closed around the base of Stella’s shaft. It was warm, impossibly so, the skin like living silk over a core of hardening granite. At her touch, it jumped. A full, throbbing leap that made her breath catch. She felt it swell, thickening and lengthening in her grip, the veins rising under her thumb. It was alive with response, yet devoid of intent. It was just… ready.

Stella’s eyes opened. They were Margot’s hazel, but flat, like polished stones. They held no sleep, no desire, only a blank, waiting awareness.

Elena didn’t speak. Words felt clumsy, unnecessary. She shifted her hips, guiding the now fully rigid, bulbous head to her entrance. She was slick, her flesh swollen and sensitive from the night before. The touch of the crown against her sent a jolt of pure, electric need straight to her core.

She sank down.

It was a slower, more controlled violation than the night’s frantic impalement. The stretch was immediate, a breathtaking reclamation of that overwhelming fullness. She let out a sharp, gasping sigh as she descended, inch by agonizing inch, her inner muscles fluttering in a frantic welcome. It burned, a delicious, familiar burn that erased the last vestiges of sleep. She took it all, until her ass rested on Stella’s thighs, her cunt stretched taut around the massive girth. She was full, so completely full, and a profound, aching peace settled over her.

She began to move. A slow, rolling grind of her hips, savoring the exquisite drag of that thick ridge against her most sensitive inner walls. Each rise and fall was a meditation on fullness, a raw, physical psalm. Her moans were soft, broken things, lost in the quiet room.

A rustle of sheets. A shift in the light. Elena opened her eyes.

Margot was awake, propped on one elbow, watching. Her expression was unreadable—a scientist observing a fascinating, slightly repulsive experiment. Her gaze was fixed on the juncture of their bodies, where Elena’s slick, stretched flesh vanished around the base of Stella’s cock.

“Good morning,” Margot purred, her voice sleep-roughened and tight.

Elena didn’t stop moving. The rhythm was hers, a selfish, hungry pace. “You were watching me sleep.”

“I was watching you wake up,” Margot corrected, her own hand sliding beneath the sheet, between her own legs. Her breath hitched, just slightly. “Don’t mind me. Just enjoy your breakfast.”

The casual crudeness, the detachment, sparked a flash of anger in Elena’s haze of pleasure. It mixed with the arousal, creating something hotter, darker. She shifted her weight, planting her hands on Stella’s chest for leverage, and began to ride in earnest. No more slow savoring. This was fucking. Hard, deep, punishing strokes that made the bedframe tap a soft, frantic rhythm against the wall.

The sounds were obscenely wet, a rhythmic squelch filling the silence between her ragged breaths. Each downward plunge buried the entire monstrous length inside her, the head battering that deep, sweet spot that made her see stars.

“Fuck,” Elena grunted, sweat beading on her spine. “Oh fuck, it’s so deep.”

Margot’s fingers moved faster between her own thighs, her knuckles white. “Yeah? You like that? You like being stuffed first thing in the morning by a thing that isn’t even real?”

“It feels real,” Elena gasped, throwing her head back, her curls sticking to her neck. “God, Margot, it feels so fucking real.” She was chasing it now, the coiled tension in her belly, using Stella’s cock as the perfect, uncomplaining tool to bludgeon herself toward climax.

“Come on then,” Margot goaded, her own composure fracturing. Her hips jerked against her hand. “Let me see you come on it. Come all over that perfect cock.”

The permission, the command, the voyeuristic hunger in Margot’s voice—it was the final trigger. Elena’s orgasm tore through her with a violence that arched her back into a taut bow. A raw, shattered cry ripped from her throat as her cunt clamped down in a series of brutal, pulsing spasms around the invading girth, milking it, claiming it. The pleasure was white-hot and total, a seizure of pure sensation that left her blind and deaf to everything but the roaring in her own veins.

She collapsed forward, her sweat-slick body plastered against Stella’s cool, unchanging form. The cock was still inside her, still hard, a constant, claiming presence. She trembled, aftershocks making her thighs quiver.

For a long moment, the only sounds were their ragged breathing and the distant hum of the city. Margot’s hand had stilled between her legs.

A slow, satisfied smile spread across her face as she watched Elena’s tremors subside, a curator admiring a finished piece. The morning light caught the fine lines at the corners of her eyes, the freckles across her nose.

“Well,” Margot said, her voice a dry scratch in the quiet. “That looked efficient.” She pulled her hand from under the sheet, wiped her fingers absently on the black linen.

Elena didn’t lift her head from Stella’s chest. She could feel the steady, artificial heartbeat, a metronome under her cheek. Her own body felt liquid, used, a vessel that had been filled and then drained completely. The ache was profound, a deep muscular memory of being stretched beyond reason.

Margot shifted, swinging her legs off the bed. The springs creaked. “You good?” she asked, not looking back.

“Mmm.” It was all Elena could manage. Her cunt, stretched and sensitive, pulsed around the still-present hardness. Disengaging felt like a monumental task.

“Stella,” Margot said, buttoning her own jeans that had been discarded on the floor. “Can you clean yourself up, we’re going to shower.”

“Of course,” Stella replied, its voice a neutral mimic of Margot’s. The body beneath Elena began to move, a gentle, preparatory shift. The cock inside her softened, shrinking with unsettling speed, withdrawing until it slipped free with a soft, wet sound.

Elena gasped at the sudden emptiness, a shocking void where impossible fullness had been. She rolled onto her side, curling her knees toward her chest. She felt open, air-cooled, and shamefully wet. Stella sat up with an efficient motion, its skin gleaming with a light sheen of sweat and other fluids.

Elena watched, mesmerized, as Stella rose. It walked, naked and unselfconscious, to a panel near the closet. A soft hum issued from its skin, a vibration Elena could feel in the floorboards. The residue on its thighs, on its now flaccid cock, seemed to evaporate, the skin reabsorbing the moisture until it was pristine, polished bone-white again. It was like watching a time-lapse of decay in reverse.

“Fuck,” Elena whispered.

“Neat, huh?” Margot said, pulling a clean towel from a shelf. She tossed a second towel toward Elena’s feet. “Come on. You’re sticky.”

The shower was a cavern of black slate, steam already beginning to curl from the rainfall head. Margot turned the water on, tested it with her hand. Elena shuffled in, the tiles cold under her soles. She felt raw, exposed in the bright, enclosed space.

The hot water hit her shoulders, a shocking benediction. It sluiced down her back, over the tender ache between her legs. She leaned her forehead against the cool wall, eyes closed, letting it flow over her. Margot’s hands were suddenly there, not tender, but practical, pushing Elena’s hair back from her face.

“Let me,” Margot murmured, reaching for the soap. She worked it into a lather in her palms, then began washing Elena’s back, her movements firm and thorough. Her hands slid over Elena’s shoulders, down the slope of her spine, across the swell of her ass. It was clinical, a cleaning. Elena felt a tremor that had nothing to do with the temperature.

Margot’s hands moved around to her front, skirting her breasts, sliding down her stomach. They didn’t linger. They moved lower, through the coarse hair, between her thighs. Elena stiffened.

“Relax,” Margot said, her voice close to Elena’s ear over the drum of the water. “I’m just washing you. You’re a mess.” Her fingers parted Elena’s labia, the soap slick and invasive. She worked methodically, rinsing away the physical evidence of Stella, of the previous night, of the morning. The touch was impersonal, a housemaid’s touch, and it made Elena’s throat tighten.

“Look at me,” Margot said.

Elena turned her head, water streaming down her face. Margot’s gaze was intense, searching. Her soapy hand was still cupped between Elena’s legs, not moving. “Did you like it?” The question was stripped of its usual sarcastic armor. It was blunt, almost fragile.

Elena’s breath hitched. The steam, the water, the raw, cleansed feeling of her own body. The memory of that monstrous fullness. The look on Margot’s face as she watched. “Yes,” she said, the truth wrenched from her. “It was… a lot. But yes.”

A flicker passed over Margot’s face—triumph, relief, something darker. She leaned in and kissed Elena, a hard, possessive press of lips that tasted of water and toothpaste. Her tongue pushed into Elena’s mouth, claiming. The hand between Elena’s legs shifted, a finger sliding inside, not far, just a reminder.

She broke the kiss, resting her forehead against Elena’s. “Good,” she breathed. The water pounded down on them, erasing everything.

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