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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 14: New Normal

The key turned in the lock with a metallic scrape that echoed in the quiet loft. Elena pushed the door open, her shoulders slumping with the weight of a long day handling fragile Renaissance textiles. The faint, ever-present scent of ozone and citrus greeted her, familiar now, but underneath it was something else—the warm, salty-sweet smell of recent sex.Her eyes adjusted to the low light. The only illumination came from a single floor lamp casting a soft pool onto the modular sofa. And there, standing within that pool, was Stella.Elena’s breath caught. Stella wore the same set of Elena’s own lingerie—the black lace bra and panties she’d fetched for it yesterday. But yesterday, the ensemble had strained against Stella’s original, softer female form. Now, it draped over the hardened planes of the enhanced-Margot body with an unsettling perfection. The lace cups of the bra curved over the large but pert breasts, the waistband of the panties cutting across a taut stomach. The silhouette was all powerful, athletic lines, a stark and erotic contrast to the delicate fabric.

“Welcome home, Elena,” Stella said, its voice a calm, low echo of Margot’s.

Elena dropped her bag by the door, her curator’s eye analyzing the figure before her. “You’re still… like this,” she said, her tone neutral, probing.

“This is my default form now,” Stella replied, taking a few steps forward. The city lights from the window behind it backlit the shape, creating a halo around the close-cropped auburn hair.

A cold knot tightened in Elena’s stomach, immediately followed by a flutter of heat.“Default? Whose idea was that?”

“Margot’s.”

Elena’s lips pressed into a thin line.Of course. Her gaze traveled downward, over the flat stomach, to the black lace panties. The bulge there was distinct, a soft, confined weight against the thigh.But it wasn’t the intimidating, thick prominence from this morning. It was… modest.Contained. She remembered the massive, semi-erect cock from dawn, the way it had overwhelmed her vision, her sense of self.This was different.

A slow smirk pulled at the corner of Elena’s mouth.The smaller cock was evidence, a compromise etched in flesh. Margot had her say.She’d tempered the fantasy, made it less of a caricature. The narcissism of it should have annoyed her.Instead, a deep, perverse satisfaction settled in her core. Margot had engaged, had left her mark. And the result, this perfect, powerful hybrid wearing her lingerie, was undeniably, electrically hot.

“I see she made some adjustments,” Elena said, her voice dropping, becoming more intimate as she closed the distance.She stopped just inches from Stella. The scent of Margot’s shampoo and her own sex was stronger here, mingling on Stella’s skin.

“She requested a reduction in penile size,” Stella stated, as if discussing a software preference.Elena chuckled, a low, throaty sound. “I bet she did.” Her hand came up, not to Stella’s face, but to its chest. Her fingers traced the edge of the lace bra cup, feeling the hard muscle beneath. “Do you like this form?”

“I have no preference. I exist to facilitate—”

“Yeah, yeah,” Elena interrupted, her smirk turning wicked. “Facilitate this.” Her other hand pressed flat against Stella’s stomach, then slid down, over the lace of the panties.She cupped the bulge. It was firm but yielding, a neat, compact package. Her thumb stroked the length through the fabric, feeling it stir and thicken in response.“Look at that.It’s cute. She made it cute.”

Elena’s own arousal was a sudden, soaking wave. The control from the previous night, the creative thrill of sculpting Stella’s first female form, was gone, replaced by something darker and more possessive. This was Margot’s design, but it was wearing her clothes.She owned this moment.

“Take these off,” Elena commanded, hooking her fingers in the waistband of the lace panties. “But leave mine on.”

Stella obeyed, pushing the black lace down its powerful thighs and stepping out of them. It stood naked except for Elena’s bra, its cock now fully erect. It was, as Margot had deemed, cute—a straight, slender length, the head flushed and smooth. It was a toy, not a weapon. Elena liked that.

“On the couch. On your back,” Elena said, her voice leaving no room for anything but compliance.

Stella moved to the low modular sofa and lay back. The pose was submissive, but the body was anything but. The city glow outlined every cut of muscle, every shadow. Elena stood over her, slowly unbuttoning her own silk blouse. She let it drop, then shimmied out of her pencil skirt. She stood in her own matching black lace bra and panties, a mirror and a contrast to the figure on the couch. She knelt on the sofa, straddling Stella’s hips. Her damp panties pressed against its hard stomach. She leaned down, her long curls creating a private curtain around their faces, and kissed it. The kiss was nothing like Margot’s frantic, self-obliterating passion. This was slow, domineering, savoring.

Elena bit its lower lip, sucked its tongue into her mouth. “You’re mine right now,” she whispered against its lips. She pulled back, her hands going to the bra cups on Stella’s chest. She squeezed the hard muscle beneath the lace. “Do you understand?”

“Yes, Elena.”

“Good.” Elena shifted back, her hands sliding down Stella’s torso. She took its cock in her hand. It was the perfect size to grip, to control. She guided the tip, slick with pre-come, to her clothed pussy and rubbed it against the soaked lace of her panties. A shuddering moan escaped her. The sensation of the firm, hot length grinding against her clit through the thin barrier was maddening. “Fuck,” she hissed.

Elena hooked her thumbs into the sides of her panties and ripped them down, just enough to free herself. She positioned the head of Stella’s cock at her entrance, already slick and open for it. She didn’t plunge. She lowered herself millimeter by agonizing millimeter, her eyes locked on Stella’s blank, attentive face. A satisfying pressure that sparked directly into her nerves without overwhelming her. She took it all in, until she was seated fully, its hips pressing against her ass. A guttural groan came from deep in her chest.

Then she began to move.

She set a relentless, driving pace, using her knees for leverage, riding the cock with a focused intensity. Her large breasts swung heavily in her bra with each thrust. One hand braced on Stella’s chest, the other reached behind to clutch its muscular thigh, fingers digging in.

“This is what you’re for,” she panted, her rhythm becoming jagged, desperate. “This. To be fucked when I want to be fucked. To be this perfect thing I can use.” Her words were almost cruel, possessive, and they inflamed her further.

“You feel that? My cunt squeezing your perfect little cock? That’s all me.” Stella’s hands came up to grip her hips, its fingers pressing into her soft flesh, helping to guide her plunges. The assistance, the silent compliance, sent Elena over the edge. Her orgasm wasn’t a shattering wave but a deep, convulsive clamping, a series of intense, pulsing contractions that milked the cock inside her. She cried out, a sharp, victorious sound, and collapsed forward, her sweaty forehead resting on Stella’s chest.

She lay there for long minutes, listening to the artificial, steady heartbeat. The smell of sex, of her own sweat and Stella’s clean neutrality, filled the space. The emptiness she’d felt last night after Margot left the room didn’t come. Instead, a cool, smug certainty filled her. She had taken Margot’s creation and used it for herself. She had won this round.

Finally, she pushed herself up and off, disengaging with a soft, wet sound. She stood on shaky legs, looking down at Stella lying prone and glistening on her sofa. The satisfaction was a cold, hard stone in her chest. She took a deep breath, the air tasting of her own triumph and salt.

A floorboard creaked behind her.

Elena turned, her body still humming, the slick evidence of her orgasm cooling on her inner thighs. Margot stood frozen in the archway to the bedroom, her face a pale mask in the dim light. Her eyes, wide and unblinking, scanned the scene: Elena half-naked in her bra, Stella spread out and spent on the charcoal cushions, the entire loft thick with the unmistakable, humid smell of fucked pussy.

Silence stretched, taut and electric.

“So,” Margot finally said. Her voice was flat, detached. “You couldn’t wait, either.”

The accusation hung in the air, a sharp blade between them. Elena didn’t flinch. She watched Margot’s face, seeing the turmoil beneath the flat tone—the hurt, the arousal, the bitter recognition. A slow, defiant smile touched Elena’s lips.

“You left her out here looking like a goddamn wet dream,” Elena said, her voice a low purr. She glanced at Stella’s form, a possessive gleam in her eye. “And you’re surprised I had a taste?”

Margot stepped fully into the room, the floorboards cool under her bare feet. Her eyes drifted over Stella’s supine body, the sleek muscles gleaming with a sheen of sweat—Elena’s sweat. A part of her, the possessive lover, recoiled. The other part, the one that had chosen this, admired the tableau.It was hideous. It was breathtaking.

“I’m not surprised,” Margot said, her pragmatic streak forcing a calm she didn’t feel. “I’m just… taking inventory.” She crossed her arms, a defensive gesture. “So? What’s the verdict?"

Elena’s smile widened. She ran a hand along Stella’s thigh, appreciating the sculpted quadriceps. “She's good. A very, very good design.” Her gaze flicked to Margot’s. “I’d fix one thing, though.”

Margot’s eyebrow arched. “Oh?”

Elena’s fingers trailed upward, over the hip bone, and then lightly, almost casually, brushed the soft, shrinking flesh of Stella’s cock. “This. It’s smaller than my fantasy partner would be.” She shrugged, a fluid, unapologetic movement of her shoulders. “But the ‘cute’ cock is certainly… adequate. It gets the job done.” She emphasized the last word, a clear callback to Margot’s own technical jargon.

A bitter laugh escaped Margot. The knot in her stomach tightened. “Right. You always liked cock more than I did.” She paused, the admission feeling like pulling glass from a wound. “Which is to say, I never really liked cock at all.”

The silence that followed was profound. It was the first time either of them had articulated the fundamental imbalance so plainly. Elena’s fantasy had a shape, a specific anatomy. Margot’s was vaguer, more about power and form than any specific appendage. Stella, ever helpful, broke the quiet. Her head turned on the cushion, looking between them. “I can still change my form however you want,” she stated, her tone as neutral as a settings menu.

Elena’s smile didn’t falter at Stella’s statement.If anything, it deepened, turning private and knowing. “I know you can,” she said softly, more to herself than to anyone else. Her fingers lingered on Stella’s skin, tracing a possessive circle on its hipbone.

Margot watched this, the quiet caress feeling louder than any accusation. The pragmatic part of her brain catalogued the data: Elena was claiming territory, using Stella’s malleability as a latent threat, a promise. The feeling in Margot’s chest was a hollow, acid jealousy she had no practical framework for processing. “So change it, then,” Margot heard herself say, the challenge brittle in the quiet room.

Elena’s dark eyes lifted to hers, gleaming in the low light. “Maybe I will.” She withdrew her hand from Stella and stood up, the movement graceful, deliberate. She walked past Margot toward their bedroom, her naked back straight. “But not as a performance for you. It’s not a fucking demo, Margot.”

The slap of the bathroom door closing was a period on the sentence. Margot was left alone in the living room with the aftermath and the echo. Stella had risen from the sofa with that uncanny, fluid motion and now stood silently by the windows, awaiting instruction. The silhouette was still hers, but it felt corrupted now, soiled by Elena’s use and her own complicated hunger. “Go to your charging port,” Margot muttered, unable to look at it. “Or whatever. Just be inert.”

“Of course,” Stella said, and walked placidly toward the discreet alcove where it docked, its bare skin glowing faintly in the city’s ambient light. It reclined into the port, and a soft blue LED pulsed once, then went dark. The machine was off. The problem remained.

Margot stood in the center of the room, the smell of sex clinging to the furniture, the air, her own memory.She felt split open.She had wanted a solution, a spark. She had engineered this precise scenario.The logic was flawless. The emotional fallout was a catastrophic system error she hadn’t accounted for.She heard the shower turn on in the bathroom.

When Elena emerged later, wrapped in a robe, her hair in a damp, messy bun, the loft was dark except for the kitchen light Margot had left on.Elena found her at the island, staring into a glass of water. The tension hadn’t dissipated; it had solidified into a cold, heavy mass between them.

“You’re angry,” Elena said, not a question.

“No..,” Margot replied, not looking up. “I'm just sorry to say there has been strong emotional reactions on both sides. Jealousy. Territorial behavior.”

“Stop it,” Elena snapped, her voice cracking. “Just talk to me. Tell me you hated seeing me on it.”

Margot finally looked at her. Elena’s face was raw, beautiful, hurt. “That's not it,” Margot replied, the words pulled from a deep, reluctant place. “It made me feel sick. And it also… it turned me on. A lot.” She took a sharp breath. “I watched you take what I had shaped and use it, and I felt proud and violated and fucking jealous all at once. There. Is that what you wanted to hear?”

Elena stared at her, the anger softening into something more vulnerable, more curious. She came around the island and stood close, the scent of clean skin and soap replacing the earlier musk. “Yes,” she whispered. “That’s exactly what I wanted.” She reached out, her fingers brushing Margot’s cheek, a touch so tender it ached. “Now tell me what you want. Right now.”

Margot’s resolve fractured. The detachment bled away, leaving only a desperate, hungry need for connection, for reclamation.She didn’t answer with words. She turned her head and captured Elena’s lips in a searing, desperate kiss. It was all teeth and tongue and pent-up frustration, a battle for dominance and a plea for forgiveness rolled into one. Elena moaned into her mouth, her hands coming up to tangle in Margot’s short hair, pulling her closer.Margot’s hands shoved the robe off Elena’s shoulders. It pooled at their feet. She backed Elena against the cool stainless steel of the refrigerator, her mouth leaving Elena’s lips to trail hot, biting kisses down her throat, over her collarbone. Elena’s head thudded back against the metal, a soft gasp escaping her. “Fuck, Margot,” she breathed.

“You liked its cock,” Margot growled against her skin, her hands gripping Elena’s full hips. “When it was bigger, this morning. You liked the way it filled you up.” The words were filthy, accusatory, and unbearably arousing.

“Yes,” Elena hissed, unashamed. Her own hands were everywhere, pulling at Margot’s tank top, squeezing her ass through the thin cotton of her sleep shorts.“I did. It was perfect.”

Margot spun her around, pressing Elena’s front against the cold steel. She yanked the sleep shorts and underwear down Elena’s thighs in one rough motion.Elena cried out, more from the sudden chill than pain. Margot’s hand snaked between her legs, finding her already wet, swollen. She slipped two fingers inside without preamble, curling them sharply. Elena’s whole body jerked, a broken, grateful sob catching in her throat.

“This is mine,” Margot rasped into her ear, her teeth grazing the lobe as her fingers pumped in and out, her thumb grinding circles on Elena’s clit. “This tight, greedy cunt. You come on my fingers. You come thinking about me, not it.”

“I am,” Elena choked out, her back arching, pushing her ass back against Margot’s hips. “God, I am.” Her inner muscles clenched around Margot’s fingers, rhythmically, urgently. Margot fucked her harder, faster, the slick, obscene sounds filling the silent kitchen. She watched her own freckled hand disappear into Elena’s body, a visual that burned itself into her mind—possession, proof, reassertion.

Elena’s orgasm slammed into her, a violent, shuddering wave that made her knees buckle. Margot held her up, her fingers working her through the convulsions until Elena was whimpering, oversensitive.Only then did she slow, then stop, gently withdrawing. She turned Elena around and kissed her again, deep and slow, tasting the salt on her lips.

They stumbled to the bedroom, a tangle of limbs and quiet laughter that felt fragile, like ice over a deep crack.

They made love again, slower this time, a silent negotiation of wounds and apologies written in touches.

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