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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 15: Just Us

The grey light of a rainy dawn seeped around the edges of the blackout blinds, painting the bedroom in shades of charcoal and damp ash. Margot surfaced from sleep not with a jolt, but with a slow, viscous awareness. The first sensation was the weight of Elena’s head on her chest, the tickle of her curls against Margot’s chin. The second was the faint, circular pressure of Elena’s fingertip tracing the lines of her abdominal muscles.

Margot kept her breathing even, her eyes closed, committing the feeling to memory. Elena’s touch was light, almost reverent, mapping the familiar territory of Margot’s body as if checking for changes.

“I know you’re awake,” Elena murmured, her voice husky with sleep.

A small smile broke Margot’s practiced stillness.She opened her eyes. Elena was propped on an elbow, watching her, the warm olive of her skin a stark contrast to the white sheets. Her expression was soft, unguarded, stripped of last night’s defiant heat.

“Maybe,” Margot conceded.

Elena’s hand slid lower, her palm flattening against Margot’s stomach, then dipping beneath the waistband of her briefs. Her fingers splayed through coarse auburn curls.Margot’s breath hitched, a sharp intake that filled the quiet room.

“I needed that last night,” Elena whispered, her eyes locked on Margot’s. “Just you. Fucking me against the fridge like I was a stranger you had to claim.”

The crude words, spoken with such tenderness, ignited a fresh spark in Margot’s core. She rolled, pinning Elena beneath her, the sheets tangling around their legs. She kissed her, not with the desperate anger of the kitchen, but with a deep, aching possession. “It was me,” Margot said against her lips. “It’s always been me.”

Elena’s arms wrapped around her neck, pulling her down. “Show me.”

They made love with a slow, deliberate intensity that felt like an apology and a reaffirmation. Margot took her time, worshipping Elena’s body with her mouth, her tongue tracing the heavy curve of a breast, the dip of her navel, the sensitive skin of her inner thighs until Elena was writhing, her fists clenched in the sheets. Only then did Margot slide down, pressing her face into the wet heat between Elena’s legs.

She licked her slowly, a broad, flat stroke that made Elena cry out. Margot savored the taste, the scent—pure Elena, untouched by any artificial silicone or synthetic sweat.This was the core of her, the essential flavor of the woman she loved. She fastened her mouth over Elena’s clit and sucked, hard, while her fingers, slick with saliva and arousal, pushed inside.Two, then three, curling upward.

“Yes, right there, god, Margot, right there,” Elena chanted, her hips lifting off the mattress, driving herself onto Margot’s face and hand. Margot fucked her with her fingers, relentless, her tongue flicking the tight, swollen bud in a rapid counterpoint. She felt the exact moment Elena’s body tensed, the inner muscles clamping around her fingers in a series of rhythmic, pulsing spasms. Elena’s cry was muffled by the pillow she’d buried her face in.

As Elena came down, breathing in ragged gulps, Margot moved back up her body, kissing the sweat from her sternum, her throat, finally her mouth. Elena kissed her back lazily, tasting herself on Margot’s lips.

Then, with a strength that still surprised Margot, Elena flipped them. She straddled Margot’s hips, her eyes dark and determined.“My turn,” she breathed.

She bent down, her long hair creating a fragrant curtain around Margot’s hips, and took Margot into her mouth. Elena’s skill was intuitive, unhurried. She licked and sucked, her hands gripping Margot’s thighs, holding her down as Margot’s back arched. The orgasm built slowly, a tight coil in Margot’s belly, then snapped free with a violence that left her vision blurred at the edges. She grunted, a short, guttural sound, her fingers tangled in Elena’s hair.

Later, they lay twined together, skin slick, the room smelling of sex and sleep.The rain pattered softly against the window. Elena’s head was back on Margot’s chest.“Me too,” Margot said quietly, breaking the long silence.

“Hmm?”

“I needed that, too. Just you.” She paused, the next admission hovering on her tongue, dangerous and true. “But I also can’t stop thinking about her watching us.”

Elena laughed, a soft, knowing exhale against Margot’s skin. Her hand, which had been idly stroking Margot’s arm, stilled. “Neither can I.”

The words hung there.An invitation.

Margot turned her head, looking past Elena’s tousled hair to the bedroom door, slightly ajar. Through the gap, she could see a sliver of the living room, and the soft, steady pulse of the blue LED from Stella’s charging port.Inactive.Waiting.

“What if she wasn’t just watching?” Margot heard herself ask, her voice low. Elena lifted her head, searching Margot’s face. “What do you mean?”

“I mean…” Margot’s pragmatic brain kicked in, framing the desire as a hypothesis. “We establish parameters. A… shared experience. One where we control all the variables.”

A slow smile spread across Elena’s face, one that didn’t reach her eyes immediately. It was the curator’s smile, the one she used when presented with a fascinating, contentious artifact. “You want to include her.”

“I want to use her,” Margot corrected, the clinical term feeling like armor. “Together. On our terms.”

Elena was silent for a long moment, her gaze drifting to that same sliver of blue light. The memory of Stella’s enhanced-Margot body, wearing her lingerie, flexed in the space between them. The memory of her own possession of it on the sofa. The memory of Margot’s jealous, turned-on reaction. “Okay,” Elena said finally, the word decisive. She swung her legs out of bed, the cool air raising goosebumps on her naked skin.

Then Margot’s eyes flicked over Elena’s shoulder to the bedroom door. Her voice, when she spoke, was clear and commanding, stripped of all vulnerability. “Stella. Come here.”

A soft, nearly silent whirr emanated from the living room. The pulse of the blue LED ceased. Footsteps, light and precise, approached the doorway. Stella appeared, its enhanced-Margot form moving with that unsettling, efficient grace. It still wore Elena’s black lace bra and panties, the fabric fitting the muscular torso with a tailored perfection that was, in itself, a kind of obscenity. It stopped at the threshold, awaiting instruction.

“Come in,” Margot said, her tone casual, as if summoning a pet. Stella stepped into the room, the defined muscles of its thighs flexing with each step. It stood patiently beside the bed, its expression placid, its hands at its sides.

Margot’s gaze swept over the figure, from the cropped auburn hair down to the lace-covered bulge. A smirk, thin and knowing, touched her lips. She leaned back on her hands, her own lean body on display. “You know,” Margot began, her voice conversational, “Elena said your cock was ‘cute’. That it was ‘adequate’.”

Elena stiffened beside her. “Margot—”

“But we both know that’s not true, don’t we?” Margot continued, her eyes locked on Stella’s, ignoring Elena’s protest. “I saw your face yesterday morning. When it was big. When it was really big. You weren’t thinking about adequate.” She shifted her focus to Elena, whose olive skin was flushing a deep rose. “You liked that one. The one I didn’t design. You liked being stuffed by it.”

Elena’s mouth opened, but no sound came out. The raw truth of it, weaponized by Margot’s clinical detachment, stripped her of retort.

Margot turned her head fully toward Stella.Her smirk solidified into a cold, decisive line. “Grow it,” she commanded.“Grow your cock bigger. A lot bigger.”

Stella blinked, a smooth, automated motion.“Of course.” There was no hesitation.

A subtle tremor seemed to run through Stella’s groin. The black lace of the panties strained. The fabric, already outlining a modest shape, began to distend. It swelled steadily, a rapid, silent inflation that pushed the lace into a taut, trembling tent. The sheer material stretched thin over the burgeoning flesh, revealing a shadow of the thick, veined shaft beneath.

Elena watched, hypnotized. Her protest died in her throat, replaced by a sharp, audible intake of breath. The growth didn’t stop. The shaft thickened, lengthening, pushing the waistband of the panties down its hips. The head of the cock, a broad, smooth helmet, pressed firmly against the lace. The defined muscles of Stella’s abdomen tightened, as if channeling energy into the transformation. With a final, silent surge, the lace could no longer contain the mass. The delicate side seam split with a soft protest. The cock sprang free, fully erect, immense. It was a brutal, stunning organ, thicker than Margot’s wrist and long enough to curve slightly against Stella’s stomach. The skin was flawless, a perfect shade of flushed pink, with a tracery of prominent blue veins. It looked heavy, solid, utterly unreal and yet viscerally present.

The room was silent except for Elena’s ragged breathing. Her eyes were wide, her lips parted, her gaze glued to the monstrous, veined shaft now standing rigid from Stella’s lace-trimmed hips. It was a brutal sculpture of flesh, both alien and deeply familiar, a fantasy rendered in disturbingly perfect detail.A low, impressed whistle cut through the heavy air. Margot smiled, almost slyly, seeing the profound effect the growth she had instructed had on Elena. The raw hunger in Elena’s face, the slight tremor in her hands as they clutched the sheets, was a better reward than any orgasm. She leaned back, her own body humming with power.

“Now that,” Margot commented, her voice dripping with dark amusement, “is a cock.”

Elena didn’t look at her. She couldn’t. Her entire world had narrowed to the sheer, impossible size of it. “Jesus Christ,” she whispered, the words barely audible.

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