Cover of The Temptation of the Unchosen Heart

The Temptation of the Unchosen Heart

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Nikki Martinez Harry Styles Harry is dating Nikki's sister, but he is starting to develop feelings for Nikki Does he succumb to the feelings he has for her, or does he stay with her sister and push those feelings down

Chapter 1: First Impressions

The first time Nikki Martinez met Harry Styles, she spilled an entire beer down the front of his favorite shirt.

It was at a cramped, sweaty gig for his band at The Whiskey Barrel. He was just some guy with curls sticking to his forehead, tuning a guitar in a corner that smelled of stale hops and ambition. She’d been maneuvering through the crowd, holding two pints aloft for her roommate, when a surge from the mosh pit sent her crashing into his back.

The lager arced through the air in a perfect, frothy parabola.

“Shit. Oh my God, I’m so sorry.”

He’d looked down at the dark stain spreading across the vintage Clash tee, then back up at her. Instead of anger, a slow, disarming smile broke across his face. “It’s alright. Free beer bath. Probably needed it.”

“Let me…” Nikki fumbled, setting the surviving pint on an amp and grabbing a stack of napkins from the bar. She started dabbing at his chest, her face burning. “I’ll buy you a new one. Or, I don’t know, pay for dry cleaning?”

He took the napkins from her, his fingers brushing hers. A simple, static shock of a touch. “Don’t worry about it. I’m Harry.”

“Nikki.”

“You here for the music, Nikki, or just to assault the performers?”

She’d laughed, a real, unexpected laugh that cut through her embarrassment. “A little of both, apparently.”

He talked to her for ten minutes straight, asking about her art, making her explain her graphic design projects until the lead singer yelled for him. His green eyes held hers a beat too long. “Stick around after. Yeah?”

She did. They all went for late-night tacos. He stole a pickled jalapeño from her plate. She argued with him about the best Nineties cartoon theme songs. When he walked her to her car, the Los Angeles night warm and buzzing around them, he didn’t try to kiss her. He just said, “This was the best night I’ve had in months.” And she believed him.

She was still smiling about it two days later when her sister Sofia facetimed her, squealing. “You’ll never believe it! I met someone. He’s a musician. He’s so sweet, Nix. And get this—his name is Harry.”

The ice that filled Nikki’s veins then had never fully melted.

Now, months later, the memory felt like a artifact from another life. Sofia’s backyard glowed under a sky of scattered constellations. The party had wound down, the laughter and music fading into a comfortable silence punctuated by the chirp of crickets. Inside the house, a few stragglers chatted over the last of the wine. Sofia was in the kitchen, loading the dishwasher.

Nikki sat alone on a wicker chair, the cushion sighing under her weight. She stared into the fire pit, where embers pulsed a faint, living orange beneath a blanket of grey ash. A heartbeat caught between existence and nothing. The string lights overhead cast fractured gold across her hands.

She heard the back door slide open and close. A soft click. Footsteps on the flagstones. She didn’t need to look.

Harry lowered himself into the chair beside hers. Not too close, but the night air between them seemed to warp and thicken. She could smell his cologne, something clean and green, mixed with the scent of woodsmoke.

“Hey,” he said. His voice was quiet, roughened by the night.

“Hey.” She kept her eyes on the embers. “Sofia’s inside.”

“I know.”

He ran his fingers through his curls, a gesture she’d come to recognize as a tell. Anxious. Conflicted. The tattoos on his forearm shifted in the dim light.

“She’s happy,” Nikki said, the words a ward, a protection.

“She is.”

Silence stretched, taut and uncomfortable. The unspoken thing in the yard with them had grown teeth and claws over the summer. It circled them now, a predator in the dark.

“I can’t do this anymore, Nikki.”

Her breath hitched. “Do what?”

“This.” He gestured vaguely between them. The space that felt like a third person. “The… carefulness. The editing. I say something, and I watch you parse it before you answer. I see you tuck your hair behind your ear exactly three times when I’m in the room. I notice you wear that perfume—the one with the sandalwood—every time we’re supposed to meet.”

She touched the small crescent moon inked behind her ear, a nervous habit. “You shouldn’t notice that.”

“I can’t stop noticing.”

His confession hung in the air, more palpable than the smoke. It was a door swinging open onto a room they’d both been pretending wasn’t there.

“Harry,” she whispered, a plea and a warning.

“I think about that night at The Whiskey Barrel all the time,” he continued, his voice cracking on the edges. “I think about the jalapeño. I think about you explaining color theory to me like I was five. I play whole conversations back in my head. And then I see you here, with her, and you’re so careful with me. It’s like living in a constant correction.”

She finally turned to look at him. The string lights caught in his green eyes, turning them luminous. The ache in her chest was a physical thing, a hollowed-out space filled with guilt and a terrifying, traitorous longing.

“She loves you,” Nikki said, the truth a bitter stone in her throat.

“I know.” He leaned forward, elbows on his knees, staring into the same dying fire. “And what does that make me? Because the person I… the person I can’t stop thinking about, is you.”

The words landed, a direct hit. She felt them in her bones.

He reached out then, slowly, giving her every chance to pull away. His fingers brushed the back of her hand where it rested on the arm of the chair. The contact was electric, a jolt that traveled straight up her arm and coiled in her stomach. It was the first time they had touched since the napkins, since before he was Sofia’s.

She didn’t pull away.

His hand turned, his palm sliding against hers, his fingers threading through her fingers. His skin was warm, slightly calloused from guitar strings. A musician’s hand. A hand that wrote songs her sister bragged about.

“This is wrong,” she breathed, but her fingers tightened around his.

“It feels like the only real thing in months,” he countered, his thumb stroking the inside of her wrist, right over her frantic pulse.

Inside the house, a burst of laughter. Sofia’s laugh, bright and uncomplicated. Nikki flinched, trying to pull her hand back, but he held on, not forcefully, but insistently.

“Harry, we can’t.”

“I know.” The pain in his voice mirrored her own. “But I had to say it. I had to… feel this for one second without pretending.”

They sat there, fingers knotted together in the secret dark, the embers fading beside them. The weight of Sofia’s trust, of the future that would shatter, pressed down on them. And yet, for this stolen, silent minute, the connection was a current, humming and alive. It was a question without an answer. A chord left ringing.

The back door slid open again.

“Harry? You out here?” Sofia’s voice, sweet and searching, cut through the night.

Their hands flew apart as if burned. The space between them instantly flooded with cold, guilty air.

Nikki stood up, her chair scraping loudly on the stone. “I’m here too,” she called, her voice miraculously steady. “Just getting some air.”

Sofia appeared in the rectangle of golden light from the doorway, a silhouette. “Oh, good. You’re both here. Come in. I made coffee.”

Harry stood, shoving his hands deep into his pockets. He wouldn’t look at Nikki.

“Yeah,” he said, his voice now a rough echo of its former self. “Coming.”

Nikki followed him toward the light, the ghost of his touch still branded on her skin, the echo of his confession a roar in her ears. The heartbeat in the fire pit had finally gone dark.

The heartbeat in the fire pit had finally gone dark.

The coffee tasted like ash. Nikki sat on Sofia’s overstuffed couch, knees tucked to her chest, cradling the mug as if it could warm the cold knot in her gut. Sofia chatted, oblivious, curled into Harry’s side on the opposite armchair. His arm was draped around her shoulders, his thumb absently stroking her sleeve.

Every pass of his thumb felt like a searing brand on Nikki’s own skin.

She watched his hand. Remembered the feel of it, rough and warm, interlaced with hers just minutes ago. The contradiction was a physical nausea. One minute, his confession hanging between them like a shared secret. The next, this performance. This comfortable, easy affection with her sister.

He was a better actor than she’d given him credit for.

“You’re quiet, Nix.” Sofia’s voice cut through her spiraling thoughts. “Too much wine?”

Nikki forced a smile, tight at the corners. “Just tired. Think I’m gonna head out.”

“Aw, already? Harry’s about to play the new bridge he wrote. It’s so good.”

Harry finally met Nikki’s eyes over the rim of his mug. A current, sharp and dangerous, passed between them. He looked away first. “It’s not really ready,” he muttered.

“Play it,” Nikki heard herself say. The challenge in her voice was subtle, but she saw him catch it. A flicker in his green eyes.

Sofia beamed. “See? Audience demands it.”

With a sigh that seemed to carry the weight of the world, he untangled himself from Sofia and reached for the acoustic guitar leaning against the bookcase. He settled back, not looking at either of them, and began to tune.

The first chord was dissonant. Unresolved. He played a progression that was nothing like the catchy, upbeat pop-leaning stuff Sofia always gushed about. This was darker. A restless, searching melody that spiraled and climbed but never quite found its way home. He didn’t sing. He just played, his head bowed, curls falling forward to hide his face.

Nikki felt the music in her teeth. In the hollow of her chest. It was the sound of the embers dying. It was the touch of his hand in the dark. It was guilt given a soundtrack.

Sofia frowned slightly, her head tilting. “It’s… moody.”

Harry’s fingers stilled on the strings, killing the note abruptly. “Yeah,” he said, his voice flat. “It is.”

The silence that followed was suffocating. Nikki stood up, the need to escape a sudden, primal instinct. “I really have to go. Early client call.”

She hugged Sofia goodbye, breathing in the familiar vanilla scent of her sister’s shampoo. The hug felt like a betrayal.

“Walk her out, Har?” Sofia asked, already collecting the mugs.

He just nodded, setting the guitar down carefully.

They didn’t speak as they moved through the quiet house, through the front door, out into the cool night air. Her car was parked at the curb under a pool of jaundiced streetlight.

She turned to say a stiff, formal goodnight. The words died.

He was right there. Close enough for her to see the frayed edge of exhaustion in his eyes, the tense set of his jaw. The careful mask was gone, stripped away by the raw strain of the evening.

“Nikki.” Her name was a rasp, a plea.

“Don’t.” She took a step back, her spine hitting the driver’s side door. Trapped.

“What you do to me…” He closed the distance, one hand slamming against the car roof beside her head, caging her in. He didn’t touch her, but the heat of his body was an invasion. “It’s fucking torture. You feel it. I know you do.”

She shook her head, a weak denial. The air between them crackled.

“You feel this?” His other hand came up, but instead of touching her, he fisted it at his side. The control he was exerting was palpable, a trembling energy. “This is what I live with. Every goddamn day. Watching you. Wanting you. And having to just… be fucking pleasant.”

His anger, his desire, was a mirror of her own. It shattered her last pretense. “So what?” she hissed, the fury erupting, low and venomous. “What do you want to do about it, Harry? Huh? You want to fuck me? Here? Against my car where my sister might look out the window?”

The crude, brutal words hung in the air. A dare.

His control snapped.

A sound, almost a growl, escaped his throat. His hand flew from the roof and gripped her jaw, not hard, but utterly decisive. He tilted her face up to his. “Yes,” he breathed, the word hot against her lips. “That is exactly what I want to do.”

And then his mouth was on hers.

It wasn’t a kiss. It was a claiming. A punishment. A release. It was all tongue and teeth and suffocating, desperate heat. She gasped, and he took full advantage, his tongue sweeping into her mouth, tasting of coffee and bitter want. Her hands flew up, to push him away, but they fisted in the fabric of his shirt instead, pulling him closer. The guilt was a shrill alarm in a distant part of her brain, drowned out by the roaring blood in her ears.

He ground his hips against hers, and she felt the hard, insistent line of his erection through his jeans. A jolt of pure, undiluted lust shot through her, wet and shocking.

“Fuck,” he mumbled against her mouth, his free hand sliding down her side, over the curve of her hip, gripping her ass and yanking her tighter against him. “Fuck, Nikki.”

She broke the kiss, panting. “Not here.”

His eyes were wild, desperate. “Where?”

“Your place. Now.”

He didn’t hesitate. He dragged her the few feet to his beat-up Jeep, shoved her into the passenger seat. The drive was a blur of tense silence and stolen, feverish glances. His knuckles were white on the steering wheel.

His apartment was a dim, cluttered studio above a silent garage. The door barely shut behind them before he had her pressed against it, his body a solid, hungry line against her back. His mouth found the sensitive skin behind her ear, right over her crescent moon tattoo. He sucked, hard, and she cried out, her head falling back against his shoulder.

“You’ve been driving me insane,” he snarled, his hands roaming over her front, cupping her breasts through her thin top, pinching her nipples until she writhed. “That fucking perfume. That smart mouth. The way you look at me like you know exactly how full of shit I am.”

He spun her around, his mouth crashing back down on hers. This was nothing like the soft, romantic lies she’d imagined. This was ugly and real and ferociously hot. She fought him for dominance, biting his lower lip, tasting the coppery tang of blood. He groaned, the sound vibrating through her.

They tore at each other’s clothes. Buttons pinged against the wooden floor. His shirt gone, her top over her head. His chest was lean, taut, a canvas of ink she’d only ever glimpsed. She scraped her nails down his back, and he hissed, grabbing her wrists and pinning them above her head against the door.

“Tell me you want it,” he demanded, his breath ragged. His green eyes burned into hers.

“Fuck you.”

He kissed her again, deep and dirty. “Tell me.”

She struggled, but his grip was iron. The submission, the helplessness, stoked a fire in her core. “I want it,” she gasped against his mouth. “I want you to fuck me, Harry. Now.”

He released her wrists, his hands dropping to the waistband of her jeans. He popped the button, yanked the zipper down, and shoved them and her panties down her thighs in one rough motion. The cold air hit her damp skin, making her shudder. He knelt immediately, his mouth on her before she could process it.

His tongue was wicked, insistent, licking a broad stripe through her folds before circling her clit. He didn’t tease. He ate her like a man starving, one hand hooking under her knee to hike her leg over his shoulder, opening her wider. She tangled her hands in his curls, holding on as the pleasure built, sharp and too fast. She was already on the edge, the tension of the night, the secrecy, the raw need, coiling her too tight.

“Don’t stop,” she begged, her hips bucking against his face. “God, don’t you dare stop.”

He pushed two fingers inside her, curling them, fucking her with them in a swift, relentless rhythm while his tongue continued its devastating work. Her orgasm ripped through her, brutal and blinding. She muffled her scream against her own arm, her body bowing, shaking violently.

Before the waves fully receded, he was on his feet, fumbling with his own jeans. He freed himself, thick and flushed, and she didn’t wait. She pushed him backward, onto the unmade bed that took up half the room.

He landed with a grunt, and she straddled him, not bothering with grace. She took him in hand, guided him to her entrance, and sank down in one slow, searing slide.

They both cried out. The feeling of him filling her, stretching her, was overwhelming. It was ruinous. It was perfect.

For a second, they just stared at each other, chests heaving, connected in the most forbidden way. The reality of it—Sofia’s boyfriend buried inside her—flashed in his eyes, a momentary shadow.

She rocked her hips, breaking the spell. “Don’t think,” she commanded, her voice husky. “Just fuck me.”

He flipped her over onto her back with a violence that thrilled her. He drove into her, hard and deep, setting a punishing pace. The bed slammed against the wall. Each thrust was a punctuation mark on a sentence they’d been writing for months. Yes. This. You. Mine.

It was a furious, sweating, grunting collision of flesh and regret and impossible want. He fucked her like he hated her, like he worshipped her, his mouth everywhere—her breasts, her neck, her mouth. She met him thrust for thrust, her heels digging into the small of his back, urging him deeper.

“You feel so fucking good,” he rasped, his forehead damp against hers. “Too good. This is so fucked up.”

“I know,” she gasped, another orgasm building, tighter, hotter than the first. “Don’t stop.”

His hand slid between them, his thumb finding her clit, rubbing tight circles. The dual sensation shattered her. She came with a choked sob, her inner muscles clamping around him in rhythmic pulses. With a final, broken groan, he followed her, pulsing hot inside her, his whole body rigid before collapsing atop her, spent.

The only sounds were their ragged breaths and the distant hum of the city. The smell of sex and sweat filled the small room, heavy and final.

Slowly, reality seeped back in, cold and clear. The weight of him felt wrong now. The silence was accusing.

His phone buzzed violently on the floor, lighting up where it had fallen from his jeans pocket. The screen glowed in the dark room.

Sofia 💖 the caller ID read.

The pixelated heart was a punch to the gut.

Harry went utterly still. Nikki felt the exact moment the fever broke. He rolled off her, onto his back, throwing a forearm over his eyes.

The buzz continued. Insistent. A siren calling him back to shore.

The cooling sweat on Nikki’s skin felt like a coating of filth. She stared at the water-stained ceiling, the glorious, brutal haze evaporating, leaving only the wreckage.

She had done it. She had crossed the one line she never thought she would.

And as the phone finally stopped buzzing, the silence it left behind was the loudest sound she had ever heard.

And as the phone finally stopped buzzing, the silence it left behind was the loudest sound she had ever heard.

It was a physical presence. It crowded the small, dark room, pressing down on their naked, cooling skin. The heat between them had evaporated, leaving a clammy, sickening residue. Nikki stared at the ceiling, tracing a hairline crack in the plaster. It forked like lightning. Like a warning.

Harry’s arm was still over his eyes. His breath had evened out, but the tension in his body was a live wire. He was a statue of regret beside her.

She moved first. The shift of her body on the damp sheets was obscenely loud. She sat up, swung her legs over the side of the bed, her back to him. The floor was cold under her feet. Her clothes were a humiliating pile by the door. She stood, legs unsteady, and walked to them. Every step felt foreign. Her body felt used. And she had wanted it used. That was the worst part.

She pulled her panties and jeans up over her hips, her movements mechanical. The fabric chafed.

“Nikki.”

His voice was sandpaper.

She didn’t turn around. She found her bra, clasped it with fumbling fingers. Her top was inside-out. She didn’t care.

“Don’t,” she said, her own voice flat. Empty. “Just don’t say anything.”

“I have to say something.”

“What?” She spun around, the fury returning in a nauseating rush. “What could you possibly say? ‘Oops’? ‘My bad’? Your girlfriend—my sister—just called you while your cum was still dripping out of me.”

He flinched. The crude words hung in the air, a deliberate poison. He sat up, the sheet pooling at his waist. In the faint light from the streetlamp outside, he looked gutted. “It’s not that simple.”

“It’s exactly that simple.” She yanked the top over her head. “We’re just shitty people. That’s the story. Don’t dress it up.”

She found her shoes, shoved her feet into them without socks. Her purse was by the door. Escape. She needed to be gone from this room that now smelled of their mistake.

“Where are you going?”

“Home. To shower. To try and scrub my skin off.”

He stood up, the sheet falling away. He was still half-hard, glistening. The sight was a violent reminder. He grabbed his boxers from the floor, stepped into them. “Let me drive you.”

“Are you insane?” A brittle laugh escaped her. “You think I’m getting back in that car with you? That I’m going to sit there smelling us on me, on you? No.”

“Then let me call you a Lyft. It’s late.”

“I’ll walk.”

“It’s three miles.”

“I don’t care.” Her hand was on the doorknob. This was it. The point of no return. She looked back at him. “You should call her back. Tell her you fell asleep. Or that you were jamming with the band. You’re good at lies. You’ve been practicing for months.”

He took a step toward her, then stopped, as if he’d hit a wall. The space between them was now an infinite, toxic wasteland. “It wasn’t just a lie. What I feel for you… it’s not nothing.”

“It’s nothing good.” She turned the knob. “It’s just a feeling. It doesn’t mean anything. It doesn’t change what we did. It just makes us weak.”

She opened the door. The hallway light was a brutal, yellow glare.

“So that’s it?” His voice cracked. “We just… go back? I go to her house tomorrow? You sit across from us at brunch?”

Nikki paused in the doorway, her silhouette framed by the light. She didn’t look back. “You figure it out. You wanted this. You got it. Now live with it.”

She closed the door behind her. The click was final.

The walk was a purge. Each step on the cold pavement was a punishment she welcomed. The night air did nothing to clean the scent of him from her nostrils. She could still feel the brutal grip of his hands, the aching stretch of him inside her. Her body hummed with the ghost of it, a traitorous echo. She wanted to vomit. She wanted to feel it again.

She let herself into her apartment, the silence a sanctuary. She went straight to the bathroom, turned the shower to scalding. She stripped, looking at herself in the mirror. Her mouth was swollen. A bruise was forming on her neck, just below her ear. His mark. She touched it. A spark, low in her belly.

“Fuck,” she whispered to her reflection. Her eyes were wide, haunted. Empty.

Under the near-boiling water, she scrubbed. She used a washcloth until her skin was bright pink and raw. It didn’t help. She could still feel it. The violation was internal. She leaned her forehead against the cool tile, letting the water pound her back.

When she got out, wrapped in a towel, her phone was blinking on the bathroom counter. A single notification.

An Instagram DM. From Harry.

Her heart stalled. She shouldn’t look. Looking was walking back toward the fire.

She tapped it.

No words. Just a voice memo. A little waveform on the screen.

Her finger hovered. This was the cliff. She pressed play.

His voice, hushed and raw, filled the steamy room. It was just acoustic guitar, a simple, heartbreaking progression. And then he sang. Not the full, performative voice he used on stage. This was stripped. Broken.

"A spilled drink, a stolen kiss / a fucking precipice. / I built my house on the fault line / and called the tremors fine. / Now the crack runs right between / everything I swore was mine. / And the only truth I feel / is the one I have to steal..."

It lasted thirty seconds. It ended abruptly, mid-line.

The silence after was worse than before.

He was writing a song about it. Of course he was. Turning their sin into art. Making it something beautiful to hide the rot.

Another message popped up.

Harry: I can’t take it back. I don’t know if I want to.

She stared at the words. They glowed up at her. A secret in the palm of her hand.

She didn’t reply. She put the phone down, face down. She walked to her bedroom, fell onto the bed in the dark. The towel came loose. The cool air on her damp skin was a shock.

She thought of Sofia, asleep in her bed, likely texting Harry goodnight with a heart emoji. She thought of Harry, alone in that studio, writing their guilt into a melody.

Her hand slid down her body, over her stomach. Her fingers dipped between her legs, finding herself still tender, swollen. She touched herself, a ghost of the friction from earlier. A sharp, shameful bolt of pleasure shot through her. She bit her lip, hard.

This was the new silence. Not empty. It was full of his voice on the recording, the memory of his hands, the specter of her sister’s trusting smile. It was a cage of her own making, and as her fingers moved, bringing her to a quick, sharp climax that was nothing but lonely relief, she knew with absolute certainty.

This wasn’t over. It was a bomb that had just started ticking. And she was holding both wires.

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