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Workout of the Heartless

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Sidney spends her whole time working and working out. She's incredibly ambitious. She doesn't have time for a proper relationship but she decides that Oli meets the criteria of a casual sex partner. Oli has a partner already, but she believes it won't be hard to seduce him. Interactions should initially take place at the office. Don't set them at a gym. Oli is really weak and Sidney incredibly strong. Oli is noticably attracted to her.

Chapter 2: The Proposition in the Kitchen

The silence in the kitchen was absolute, broken only by the low, anxious hum of the old refrigerator and the drip-drip of a faulty tap. Maya’s hand, still gripping the chipped countertop, had gone from white to a bloodless grey. Her tears had stopped. She stared at the woman leaning against her fridge as if she were a theorem that didn’t compute.

Sidney waited. Her posture was relaxed, one ankle crossed over the other, massive arms folded over her chest. She’d stated her terms. The ball, as they said, was in their court. Her citrus-and-musk perfume cut through the smell of burnt bread and Oli’s fear, a foreign contaminant in the domestic air.

Oli’s mouth moved, but no sound came out. His mind was a scrambled terminal window, full of error messages. She’s here. She’s in my kitchen. She just said that. To both of us. The part of him that was still in the server room, the part that remembered the feel of her and the sound of her voice saying “eighty-four percent,” was vibrating with a terrifying thrill. The rest of him was numb with dread.

Maya found her voice first. It was thin, scratched raw from crying. “Get out.”

Sidney didn’t move. “You heard the proposal.”

“I heard a psychotic monologue.” Maya pushed off the counter, her small frame trembling with a fury that seemed to animate her. “Get out of my house. Now. Or I’m calling the police.”

Sidney’s head tilted, a faint smile touching her lips. It wasn’t warm. It was the look of a programmer watching a buggy script fail in a predictable loop. “And say what? That your boyfriend’s senior colleague, who he willingly had sex with last night, is in your kitchen? That’ll go over well for him. For you.”

The air left Maya’s lungs in a furious hiss. She turned on Oli, her eyes wide with betrayal. “You told her? You told her you’d call the police?”

“No! I didn’t—I just said you might leave, I was panicking, I—” Oli stammered, raising his hands in a helpless gesture.

“See?” Sidney said, her voice a calm, central pillar in the crumbling room. “Communication breakdown. Classic. You’re both reacting emotionally. I’m offering a structural solution.”

“A solution?” Maya barked a laugh that was half a sob. “You think you’re a solution? You’re the problem! You’re a predator!”

Sidney uncrossed her arms, letting her hands hang at her sides. The simple movement made her shoulders seem even broader, a physical reminder of the space she occupied. “Predators take. I’m offering. A transaction. You keep your relationship—your shared lease, your weekend brunches, your emotional support system. He clearly needs it.” She glanced at Oli, who flinched. “And I get access to his body, on a schedule that works for me. No emotional labor. No dating. Just sex.”

Maya shook her head, as if trying to clear water from her ears. “You’re insane. Why would I ever agree to that? Why would he?”

“Because you love him,” Sidney said, the words blunt and heavy. “And you know he’s not satisfied. You felt it, even before this. The distance. The distraction. You probably blamed his job, or his stress. It was me. I’m the distraction. And I’m not going away.” She shifted her gaze to Oli, pinning him in place. “And you? You’ll agree because you want it. You’re terrified of how much you want it. The server room wasn’t a mistake. It was a data sample. And the data is conclusive.”

Oli felt the truth of it land in his gut, a sickening, weighted certainty. He looked at Maya, her face crumpling in fresh hurt. He wanted to deny it. To protect her. But the memory was too visceral, too recent. The feeling of being effortlessly maneuvered, of being shown his own physical irrelevance, of being so completely used. It had rewired something in him. The guilt was there, a sharp, sour rock in his throat, but it was buried under layers of shocking, addictive sensation.

“He doesn’t want that,” Maya whispered, but her conviction was fraying. She was looking at Oli, seeing the conflict written in the slump of his shoulders, the avoidance in his eyes.

“Ask him,” Sidney challenged, her voice soft.

“Oli?” Maya’s question was a plea.

He couldn’t look at her. He stared at the peeling linoleum between his feet. The words were acid, but he forced them out. “It… it wasn’t like with us, Maya. It was… different.”

“Different how?” The plea turned to a blade.

He shook his head, helpless. How could he describe the physics of it? The humiliating, awe-inspiring demonstration of his own weakness? “She’s… stronger.”

A bitter, disbelieving laugh escaped Maya. “Stronger? That’s what this is about? You want someone who can bench press you?”

“It’s not about wanting!” Oli burst out, finally looking up, his face tortured. “It’s about… it’s about what happens. It’s like being… processed. You don’t want it while it’s happening, you’re just… overcome. And afterwards…” He trailed off, the shame silencing him. Afterwards, he felt clear. Empty. Weighed and measured.

Sidney watched this exchange with detached interest. “You see?” she said to Maya. “He can’t even articulate it to you. That’s the gap. He can talk to you about his code, his day, his anxieties. But he can’t talk to you about that. Because you can’t give it to him. I can.”

Maya wrapped her arms around herself, shrinking. The fight was draining from her, replaced by a cold, comprehending horror. She wasn’t just losing to another woman. She was losing to a different species of principle. “So what? You just… whistle, and he comes running? And I sit here and wait?”

“Essentially,” Sidney nodded. “But with stability. Predictability. I’m not interested in your domestic life. I don’t want your boyfriend. I want a reliable, submissive sexual partner. He remains, for all other intents and purposes, yours. This way, you don’t have to wonder where he is, or who he’s with. You’ll know. And you’ll know it’s purely functional. No risk of him leaving you for me, because that’s not on the table. I don’t do relationships.”

The clinical brutality of it was almost mesmerizing. She was partitioning a human life like server storage. Oli for emotional support. Oli for sex. Neat. Efficient.

“And if I say no?” Maya asked, her voice a ghost.

Sidney shrugged one formidable shoulder. “Then I walk away. And you two try to patch this up. He’ll be distant. He’ll fantasize. You’ll be suspicious, insecure. Every late night at work, every text notification, will be a crisis. The trust is already broken. You’ll either drown in the suspicion or you’ll end it in six months, bitterly. My offer removes the suspicion. It formalizes the breach.”

She pushed off the fridge, taking a single step into the center of the small room. She dominated it completely. “This is the reality. You can have the messy, painful, probably-failing version of your relationship, haunted by what he did with me. Or you can have a structured, honest version that includes it. I’m the immutable variable. The question is how you choose to solve for me.”

Maya’s eyes darted from Sidney’s impassive face to Oli’s devastated one. She was a strategist losing a war, forced to consider terms of surrender. The awful, logical part of her brain, the part that balanced budgets and planned grocery lists, was starting to analyze the offer. Certainty versus chaos. A known, contained poison versus a spreading, invisible infection.

“When?” Maya asked, the word barely audible.

“Thursday nights,” Sidney replied without hesitation. “And occasional Saturdays, if a migration requires it. Never more than three hours. I’ll text him an hour before. He comes to my place. He returns by midnight. You’ll have him the other six nights of the week. Uninterrupted.”

“Your place?” Oli croaked.

“You think I’m doing this on a server room floor every time? I have a perfectly good apartment.” She said it as if discussing a preferred brand of tool.

Maya squeezed her eyes shut. A single tear escaped, tracing a clean line through the earlier smudges on her cheek. When she opened them, she looked at Oli. Not with love, or hate, but with a weary, devastating assessment. “Do you want this? This… arrangement?”

He wanted to say no. To rush to her, to hold her, to promise to never see Sidney again. But the promise would be a lie. Sidney was right. The data was conclusive. He was compromised. He opened his mouth, but all that came out was a ragged, “I don’t know.”

It was the worst possible answer. Maya’s face closed off.

“That’s a yes,” Sidney interpreted. She pulled her phone from her back pocket, tapped the screen a few times. A moment later, Oli’s phone buzzed on the counter. “That’s my address. Thursday. 8 PM. Don’t eat a heavy dinner.” She looked at Maya. “Any other logistical questions?”

Maya just stared, hollowed out. She had no more questions. The architecture of her life had been gutted and rebuilt in the last ten minutes, and she was standing in the cold, new shell of it.

Sidney gave a short, single nod, as if closing a meeting. She turned and walked to the door, pulling it open. The afternoon sunlight blasted in, outlining her powerful silhouette. She paused on the threshold, not looking back.

“One rule,” she said, her voice carrying clearly in the quiet kitchen. “You don’t ask him about it. You don’t demand details. You don’t try to ‘reclaim’ him afterwards in some competitive way. It’s a separate process. Interfere, and the deal is void. And then you’re just back to the messy version.”

Then she was gone. The door clicked shut softly, leaving behind only the hum of appliances, the drip of the tap, and the lingering, sharp scent of her perfume, now permanently woven into the smell of burnt toast and regret.

The silence after the door shut was a physical thing, thick and suffocating. Oli stared at the spot where Sidney had been, his skin still humming with the aftershock of her presence. Maya didn’t move. She stood frozen by the counter, a statue of betrayal in the harsh kitchen light.

Minutes bled by, marked only by the relentless tap drip. Oli finally dared to look at her. “Maya,” he whispered, the name cracking.

“Don’t.” Her voice was flat, scraped hollow. “Just don’t.”

She walked to the sink, her movements robotic, and mechanically began washing a single coffee cup that was already clean. The water ran over her hands, steam rising. Oli watched the tense line of her back, the familiar slope of her shoulders he’d held a thousand times, now feeling like a foreign country. He opened his mouth, but every possible sentence—apology, explanation, plea—dissolved into ash before it could form.

A sharp, solid knock at the door made them both jump.

It wasn’t a question. It was three firm, deliberate raps of knuckle on wood. Oli’s blood turned to ice. Maya’s hands went still in the soapy water. They looked at each other, a flash of shared, terrified comprehension.

The door opened before either could move.

Sidney stepped back inside, closing it softly behind her. She hadn’t gone far. She surveyed the scene, her gaze missing nothing: Maya’s rigid posture, Oli’s deer-in-headlights paralysis, the unchanged, heavy air. “One more thing,” she said, as if continuing a momentarily paused meeting.

“What?” Maya asked, the word dull.

“I’ve reconsidered the variables,” Sidney said, leaning a shoulder against the doorframe. “My offer was one-sided. It addressed his deficiency, not yours.” Her eyes, cool and analytical, swept over Maya’s slight form. “He told you it was different. That he was… overcome. You heard the awe in his voice. That’s going to fester. You’ll feel inadequate. You are inadequate, compared to what I provide him. That inequity will poison your side of the arrangement.”

Maya turned off the tap, the sudden silence ringing. “What are you saying?”

“I’m offering to fuck you, too.” Sidney stated it as plainly as offering a spare pen. “Regularly. On a separate schedule. Oli probably isn’t enough for you anyway, is he? Not really. Not in the way that matters in bed. You make do. You’ve always made do.”

The vulgarity of it, the casual evisceration, finally snapped the last thread of Maya’s control. “You are insane!” she shouted, the sound raw and shocking in the small space. “You are a fucking insane, manipulative bitch! You waltz in here, you destroy my life, and now you’re offering me… what? A pity fuck? A threesome? Get out! Get the hell out of my house!”

She was trembling, pointing a shaking finger at the door, tears of pure rage spilling over. Sidney watched the outburst with the same detached interest she’d shown the faulty tap. She didn’t argue. She didn’t raise her voice.

She just reached down, grabbed the hem of her tight black tank top, and pulled it over her head in one smooth motion.

The rant died in Maya’s throat, choked off into a stunned gasp.

Sidney stood shirtless in the kitchen, the afternoon sun from the window etching every impossible detail. Her physique wasn’t just fit; it was a brutalist sculpture of power. The dense slabs of her pectorals, the deep, vascular cuts across her stomach, the shoulders that seemed to block the light—it was a body that rendered argument obsolete. It was a fact. And at the center of that taut, powerful torso, thick and heavy against her thigh, was the undeniable, imposing reality of her cock.

Maya’s eyes widened, her jaw slack. All the anger, the hurt, the moral outrage, was momentarily vaporized by sheer, overwhelming visual input. She’d never seen a body like that, not in real life. It was like seeing a tiger in your kitchen. Your brain just stopped.

“See?” Sidney said, her voice a low rumble. A cocky smirk played on her lips. She knew the effect. She relied on it. “This is what ‘different’ looks like. This is what ‘overcome’ feels like. You can’t compete with this. So why try? Why settle for his anxious fumbling when you can have this?”

She took a step forward, and Maya didn’t retreat. She was mesmerized, caught in the gravitational pull of Sidney’s sheer physical certainty. Sidney stopped inches away, her heat radiating against Maya’s skin. She cupped Maya’s chin, her hand calloused and strong, tilting her face up. “You’re curious. I see it. He described the feeling, but you don’t understand it. You want to understand.”

Maya made a weak, negating sound, but her eyes were locked on Sidney’s chest, then lower, dragged back by a horrifying, fascinated compulsion.

“It’s just physics, Maya,” Sidney murmured, her thumb stroking Maya’s jaw. “Mass. Leverage. Force.” Her other hand went to the button of Maya’s jeans. Maya flinched but didn’t stop her. The button popped open. The zipper hissed down.

Oli watched, frozen by the fridge, his own breath trapped in his lungs. He saw the conflict on Maya’s face shatter into pure, stunned submission. He knew that look. He’d felt it.

Sidney pushed Maya’s jeans and underwear down her hips in one efficient motion, letting them puddle at her feet. She then turned Maya around, bending her forward over the kitchen counter with effortless authority. The cold laminate hit Maya’s bare stomach. She let out a small, shocked whimper.

There was no preamble, no tenderness. Sidney spat into her palm, slicked herself, and positioned the broad, blunt head against Maya. She pushed forward, not with a slow grind, but with a single, relentless, entering thrust.

Maya cried out, a sharp, guttural sound that was pure sensation. Her fingers scrambled against the smooth countertop. Sidney sheathed herself completely, pausing, letting Maya feel the total, stretching fullness. “Breathe,” Sidney commanded, her voice steady.

Maya panted, her eyes squeezed shut. Then Sidney began to move.

It was a ruthless, precise rhythm, each powerful drive of her hips slamming Maya’s slight body against the counter’s edge. The difference was immediate, astronomical. Maya’s whimpers morphed into ragged gasps. “Oh my god,” she choked out, the words punched from her lungs.

“He never fills you like this, does he?” Sidney grunted, her pace relentless, mechanical in its perfection.

“N-no,” Maya gasped, her forehead pressed to the counter. “Never… it’s never…”

“He can’t.” Sidney adjusted her angle slightly, and Maya sawed out a sharp cry. “He doesn’t have the strength. Or the size.” She punctuated each statement with a deep, impactful thrust. “Do you feel the strength?”

“Yes!” Maya cried, her voice breaking. “God, you’re so strong… he’s… you’re so much stronger than him…”

Sidney’s eyes, cold and triumphant, lifted from the back of Maya’s head. She found Oli across the room, pinning him with her gaze as she continued to piston into his girlfriend. She held the eye contact, a brutal, unbreakable connection. “And do you feel the size?” she asked Maya, her voice dropping to a dark, intimate register.

Maya was sobbing now, a mix of overwhelm and shocking, undeniable pleasure. “It’s so big… it’s so much bigger than his… I can feel it… everywhere…”

Sidney smirked at Oli over Maya’s shuddering back, her expression one of absolute conquest. She was demonstrating her theorem on a second subject, and the results were consistent. Oli felt his own face burn with a humiliation so profound it was almost transcendent. He was witnessing his own replacement, his inadequacy measured and voiced by the woman he loved, under the relentless authority of the woman who owned them both.

Maya’s cries climbed, becoming incoherent. Her body tightened, then convulsed in a sudden, violent climax that seemed to surprise her, wrenching a final, shattered scream from her throat. Sidney rode it out, then followed with a series of short, brutal thrusts, her own release a silent, rigid shudder that she controlled with an iron will.

She held still for a moment, buried deep, before slowly pulling out. Maya slumped over the counter, boneless and gasping, a slick sheen of sweat on her skin.

Sidney stepped back, picking up her tank top from the floor. She didn’t hurry. She pulled it on, the fabric stretching taut. She looked at Oli, then at the wrecked form of his girlfriend. “Thursdays are for him. Sundays,” she said, her voice perfectly even, as if scheduling a dental cleaning, “will be for her. I’ll text you the address, Maya.”

She turned and left, the door clicking shut with the same soft finality. This time, the silence she left behind was different. It wasn’t filled with regret. It was charged with a new, terrible understanding, a rearranged world. The hum of the appliances was the same. The drip of the tap was the same. But the people in the kitchen were not.

But the people in the kitchen were not. Time pooled, thick and syrupy, around them. The only sound was Maya’s ragged, slowing breath against the laminate counter. Oli remained frozen, a spectator in his own life, watching the subtle tremors running through her back. The familiar curve of her spine now seemed marked, claimed by a presence that still choked the air with citrus and salt.

Maya pushed herself up, movements slow and dazed. She turned, leaning against the counter for support, her jeans and underwear still gathered around her ankles. She didn’t pull them up. She looked at Oli, her eyes wide, pupils blown. There was no anger left. Just a deep, shocked vacancy.

“Oh,” she said softly, the word a hollow exhalation.

Oli couldn’t speak. He just stared at the red marks on her hips, the faint imprint of the counter’s edge. His guilt was still there, but it was morphing, twisting into something stranger. A shared complicity.

“She’s…,” Maya started, then stopped. She swallowed, her throat working. “What you said. About being overcome.” Her gaze drifted to the door, as if she could still see the shape Sidney had cut in the light. “I get it now. I really, really get it.”

A shaky, incredulous laugh bubbled out of Oli. It sounded slightly unhinged. “Yeah.”

“It’s not… it’s not like sex. Not like with us.” Maya’s voice was distant, analytical, trying to process the raw data of sensation. “It’s like being… operated on. In a good way. A really, really good way.”

He nodded, a frantic, grateful movement. “Yes.Exactly. Operated on. She just… decides. And your body just complies.”

Maya finally bent, pulling her clothes up with clumsy hands. She winced slightly as the denim made contact. “I’m not even mad at you anymore. How can I be? I just let her…” She trailed off, a flush blooming on her cheeks that wasn’t entirely shame.

“I know,” Oli breathed, taking a tentative step forward. “I know. It doesn’t make sense. It shouldn’t. But it does.”

“She’s so strong,” Maya whispered, her voice filled with a kind of reverent horror. “When she pushed into me, I thought… I actually thought for a second she might break the counter. Or me. And I didn’t even care.”

“She lifted me like I was nothing. In the server room. Just… picked me up.” Oli heard the awe in his own voice, the same awe he’d condemned himself for. Now, hearing it reflected in Maya, it felt justified, normalized.

They stood there, in the wreckage of their old trust, building a new one out of shared astonishment. Maya looked at him, really looked at him, for the first time since his confession. “You want her. Like, all the time now, don’t you?”

He didn’t lie. “It’s all I think about. The way she smells. The sound she makes. The way she just… takes.”

“Me too,” Maya admitted, the words shocking them both. “And she’s going to have us on different nights. Like we’re… appointments.” A strange, feverish light entered her eyes. “That’s stupid. We should be together. When she’s here. We should… we should ask her for that.”

Oli’s pulse kicked. “A threesome? You want to… with her… with me there?”

“I want to see what she does to you,” Maya said, her curiosity raw and naked. “I want to feel what she feels like while I watch her own you. And I want…” She bit her lip. “I want her to see that we’re both hers. That she doesn’t have to split us up. We’re a package deal now. Her package deal.”

The idea was terrifying, absurd, and utterly electrifying. Oli fumbled for his phone, still on the counter where Sidney’s address had flashed up. “We should text her. Now. Before she… I don’t know, before the logic of it fades.”

Maya was already nodding, crowding next to him to see the screen. Her finger, still trembling, pointed to the unknown number. “Tell her. Tell her we talked. Tell her we want to submit. Together.”

Oli’s thumbs were clumsy on the glass.

> Oli: Sidney. It’s Oli. And Maya.

>

> Oli: We talked. Really talked.

>

> Oli: We understand what you’re offering. We want it. But not separately.

>

> Oli: We want to be together for you. When you come. We want to submit together. Please.

They stared at the screen, waiting. The three dots appeared. Disappeared. A full minute passed. The kitchen clock ticked.

> Sidney: That’s not the arrangement.

>

> Oli: We’ll make it better. We’ll do anything. Please. Just come back.

>

> Sidney: I’m home. I’m not coming back.

>

> Maya: [Taking the phone from Oli’s hand]

>

> Maya: Please Sidney. We’re begging. We see it now. How strong you are. How perfect. We just want to be yours.

>

> Sidney: Begging is boring. Prove it.

Maya looked at Oli, a wild, determined look on her face. Without a word, she handed him the phone, then pulled her shirt off over her head. She unclipped her bra, letting it fall. “Take a picture. Both of us. Now.”

Oli’s hands shook. He lifted the phone, framing Maya’s slight, bare form against their shabby kitchen cupboards. He stepped into the frame beside her, pulling his own shirt off, his skinny chest exposed. He snapped the picture. They looked pale, vulnerable, a stark contrast to the memory of Sidney’s dominance in this same space.

He sent it.

> Oli & Maya: [Image Sent]

>

> Oli: We’re yours. However you want us.

The reply was instantaneous.

> Sidney: Pathetic. Two scrawny kids playing at submission. You think a naked selfie is proof? That’s just biology.

>

> Sidney: Make do with this, you horny sluts.

A new image loaded.

It was a selfie, taken in what looked like a pristine, minimalist bathroom. Sidney stood before a large mirror, her phone obscuring her face. She was shirtless, one arm raised, her hand behind her head in a classic double-biceps pose. The mirror captured the impossible, sweeping bulk of her back—latissimus dorsi flared out like wings, etched in deep, shadowed detail. The other arm, held low, showed a biceps that was a dense, veined globe of muscle. Her torso was a geometric puzzle of abdominals, the light catching every cruel separation. She looked less like a person and more like an armored vehicle rendered in flesh.

It was a monument. A weapon. A verdict.

Oli made a choked sound. Maya gasped, her hand flying to her mouth.

“Oh my god,” Maya breathed, taking the phone. She zoomed in, her finger tracing the screen over the landscape of Sidney’s shoulder. “Look at the size of her. Look at her back. It’s like a fucking anatomy chart come to life.”

“She’s huge,” Oli whispered, his own arousal, dormant from the shock, returning in a dizzying rush. He was painfully hard. “I felt that. All of that. On me. Holding me down.”

Maya’s free hand reached for him, not in a familiar caress, but with a desperate, shared need. She pulled him to her, their skin sticking together with nervous sweat. She kept the phone aloft, Sidney’s image glowing between them. “She’s so much bigger than both of us put together,” Maya said, her voice husky. “I want to feel that on me again. I want to watch it cover you.”

Oli kissed her, but it wasn’t their old kiss. It was frantic, competitive, both of them trying to channel the phantom sensation of Sidney’s superiority into each other. He pushed Maya back against the counter, the same counter, his movements fueled by the image on the screen.

“Tell me,” he panted against her neck, fumbling with her jeans again. “Tell me how much she turns you on.”

“She makes me so wet,” Maya moaned, arching, her eyes locked on the phone. “Just looking at her, knowing that’s what was inside me. It’s all I can think about. Her strength. How she just… used me. I’ve never come that hard in my life.”

Oli entered her, and it was different. They were both thinking of someone else, both trying to approximate a force they couldn’t replicate. He moved, but his eyes were on the picture over Maya’s shoulder. “When she lifted me,” he grunted, “it was like I was made of paper. I couldn’t do anything. I didn’t want to do anything. I just wanted her to decide everything.”

“Yes,” Maya hissed, her nails digging into his back. “That’s it. No thinking. Just… being her thing. God, look at her arm. Look how thick it is. I want her to hold me down with that.”

They moved together, a clumsy simulation, narrating their fixation to each other in broken, hungry sentences. The photo was their focus, their altar. Their shared confession built a new, twisted intimacy, each admission of desire for Sidney’s power bonding them more tightly to her, and to each other in her service. The kitchen faded away. There was only the glow of the screen, the impossible physique it displayed, and their fervent, failing attempt to become, for a moment, worthy of its attention.

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