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The Seed of Deception

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While his wife is away on a business trip, a guy impregnates his wife's younger sister

Chapter 1: The Storm That Changed Everything

The house groaned, a deep wooden complaint that vibrated underfoot. Outside, the wind screamed, hurling fistfuls of snow against the windows with a sound like static. Chase checked his phone for the third time in ten minutes. No new messages. The last one from Megan, sent six hours ago, was a pixelated photo of a hotel lobby fountain and the text: Landed. Everything’s fine. Storm looks bad there, stay safe. Love you.

He typed out You too and hit send, watching the icon spin before delivering. The silence after was absolute, broken only by the throaty crackle of the fire and the house’s continued protests.

“She’s probably already in back-to-back meetings,” Aubrey said from the sofa. She had one knee drawn up to her chest, a sketchbook balanced on it. “You know how she gets. Tunnel vision.”

Chase nodded, putting the phone face down on the kitchen island. He did know. Megan’s focus was a force of nature, rivaling the one currently trying to bury the porch. It was why she was a regional manager at twenty-nine and why she was in Chicago right now. He poured himself another inch of bourbon, the amber liquid catching the firelight. “You’re sure you can’t make it home? Roads might still be passable closer to the city.”

Aubrey didn’t look up from her drawing. Her charcoal moved in quick, sure strokes. “My landlord’s texting me panicked updates about a pipe bursting in 4B. I’d rather be snowed in here than drowning in someone else’s leak.” She finally glanced over, a faint smile playing on her lips. “Unless you’re that eager to get rid of me.”

“No,” he said, too quickly. He took a sip, the burn steadying him. “Just being responsible. Concerned brother-in-law stuff.”

“How very you.” Her focus returned to the page.

He leaned against the counter, watching her. The fire painted her in warm, shifting gold. She was all loose-limbed ease, dressed in one of his old college sweatshirts and a pair of Megan’s yoga pants. Her hair, a darker blonde than her sister’s, was a messy knot on top of her head. Megan was all sharp angles and tailored blazers. Aubrey was… smudges. Soft edges. The artist.

The difference used to be academic. A fact. Lately, it felt like an observation.

“What are you drawing?”

“The apocalypse.” She turned the book around. It was a detailed, chaotic sketch of the storm-ravaged yard seen through the window, the trees bent double, the snow swirling in vicious spirals. It was angry and beautiful.

“It’s good,” he said, genuinely impressed. “You’ve captured the… menace.”

“Menace is my specialty.” She set the book aside and stretched, the hem of the sweatshirt riding up to reveal a sliver of taut, pale stomach. Chase looked away, his eyes finding the safety of the fire. “God, I’m bored. And the silence is so loud. Megan always has music on, or a podcast. This house feels different without her.”

It did. It felt hollow, and the noise of the storm only emphasized the void. Megan’s absence was a physical presence, a cold spot in the room.

“We could watch something,” he suggested.

“If the internet holds. It’s already blinking.”

An hour later, they were on opposite ends of the sectional, a throw blanket shared between them, watching an old thriller on the straining Wi-Fi. The movie was all paranoia and shadow, the wrong mood for the night. Chase was acutely aware of the distance between them, a canyon of microfiber. Every time she shifted to tuck the blanket under her legs, he caught the scent of her shampoo—something with coconut—mixed with the graphite from her pencils.

“This is stupid,” Aubrey said during a lull in the dialogue. “The killer is obviously the brother.”

“You think?”

“It’s always the brother. Or the quiet neighbor.” She pulled the blanket higher, her toes brushing his leg. She didn’t pull them away. “Megan would hate this movie. She’d be listing all the banking regulations the protagonist is violating by now.”

Chase laughed, a short, surprised burst of sound. “She would. She critiqued the financials in It’s a Wonderful Life last Christmas.”

“See? Tunnel vision.” Aubrey’s smile faded slightly. “It’s amazing, really. How she just… decides on a thing and it becomes reality. The job. The house.” She paused. “You.”

The last word hung in the air, swollen with unintended meaning. The wind chose that moment to batter the living room window, making them both jump. The lights flickered, dimmed, then surged back.

“Power’s going,” Chase said, stating the obvious just to say something.

“I know.” Aubrey pulled her feet back, sitting up. “I should go try and sleep. Maybe it’ll blow over by morning.” She didn’t sound convinced.

He stood as she did, their movements awkward in the dim, jumpy light. They were close now, in the space between the couch and the coffee table. He could see the faint dusting of charcoal on her cheek, the flecks of gold in her green eyes. The fire was behind her, outlining her in a hazy corona.

“You’ve got a little…” He gestured to his own cheek.

“Oh.” She rubbed at the wrong spot.

“Here.” Without thinking, he reached out. His thumb brushed her skin, just below her eye. It was warm. Softer than he’d imagined. She went perfectly still, her eyes locked on his. The contact lasted a second, two, a tiny forever in the trembling house. He felt the breath catch in his throat.

He pulled his hand back as if burned. “Got it.”

“Thanks.” Her voice was a whisper. She didn’t move. The movie’s score swelled, a dissonant screech of strings.

Then the lights died completely. The TV screen went black. The only light was the fire, now the solitary heartbeat of the house, throwing monstrous, leaping shadows up the walls. The sudden dark was a blanket, smothering.

“Well,” Aubrey breathed. He could barely see her, just the glint in her eyes.

“I’ll get the candles from the kitchen.” He moved, his shoulder brushing hers in the dark. A spark, real or imagined, seemed to jump between them. He fumbled in a drawer, his hands unsteady. When he turned back, she was right there.

She’d followed him.

The candle in his hand shook, the flame guttering. Her face was all planes and shadows, mysterious and utterly familiar at once.

“Chase,” she said. It wasn’t a question. It was a statement, soft and final.

He knew what was happening. He could map every single step that had led here, from Megan’s delayed text to the shared blanket to the brush of his thumb on her skin. He could list every reason this was a catastrophic idea. The list was long, and detailed, and morally sound. It played in his head with Megan’s voice.

But the storm howled, and the fire whispered, and the world beyond the windows had ceased to exist. There was only this warm, dark pocket of the universe, and the unbearable, silent pull between them. His responsibility, his love for his wife, it all felt like concepts from another life, thin and papery against the raw, immediate truth of Aubrey’s proximity.

He saw the same war in her eyes—the guilt, the envy, the wild, carefree impulse winning. She loved her sister. And she wanted this. Both things were true, and the contradiction made her eyes glitter.

He didn’t decide. Decision implied rationality. Something older and more fundamental simply overrode the system. The candle tilted, wax dripping hot on his fingers as he set it blindly on the counter.

Her hand found his in the dark. Their fingers tangled, not gently. It was a clutch, an anchor. He could feel her pulse hammering against his.

The wind shrieked its final warning. He didn’t listen. He leaned in, and the last sliver of space between them vanished.

He leaned in, and the last sliver of space between them vanished.

The kiss wasn’t gentle. It was a collision—all the pent-up silence and shared glances and dangerous proximity exploding into a single, breathless point of contact. Her lips were softer than he’d dreamed, and she tasted faintly of the wine they’d had with dinner and something else, something uniquely Aubrey. A small, desperate sound escaped her throat, and her hands came up, not to push him away, but to fist in the fabric of his shirt, pulling him closer.

The world narrowed to the heat of her mouth, the press of her body against his, the rough texture of his own sweatshirt under his searching hands. The fire popped, sending a shower of embers up the chimney. The wind slammed against the house again, a distant, unimportant protest.

For a suspended moment, there was no Megan, no storm, no tomorrow. There was only the shocking rightness of a wrong thing.

He was the one who broke it, pulling back just enough to rest his forehead against hers. Their breaths mixed, ragged and loud in the quiet room. The guilt arrived not as a wave, but as a slow, cold seep, like water through a crack in a dam.

“Aubrey,” he whispered, a statement and a question.

She opened her eyes. In the firelight, they were dark pools, wide with the same stunned realization now chilling his own blood. “Oh, god,” she breathed. Her fingers unclenched from his shirt, but she didn’t step back. The space between their bodies still hummed.

“We can’t,” he said, the words hollow. He didn’t move.

“I know.” Her voice was barely audible. She lifted a hand and touched her lower lip, as if to confirm it had happened. The simple gesture was more intimate than the kiss. “She’s my sister.”

It was the invocation of Megan that did it. The name was a bucket of ice water. Chase straightened up, putting a full step of distance between them. The living room came rushing back—the shadows, the groaning timbers, the portrait of him and Megan on the mantel now hidden in darkness.

“This is… this is a mistake.” He ran a hand through his hair, tugging at the roots. “The storm. The dark. We’re just… lonely. Or bored. Or something.”

Aubrey wrapped her arms around herself, holding the old sweatshirt tight. The vulnerability he’d seen a second ago was hardening into something else—defiance, or maybe just hurt. “Right. Yeah. Bored.” She let out a short, bitter laugh. “That’s all it was.”

The dismissal should have felt like a relief. It felt like a slap. He wanted to argue, to say it was more than that, which was the most dangerous thought of all. So he said nothing

Aubrey had already turned and headed to the guest room when she stopped.

"In case it wasn't just boredom, my door is unlocked." Aubrey winked at Chase.

The wink hung in the air between them, a ghost of her usual playful smirk, but charged now with a voltage that made the fine hairs on his arms stand up. Then she was gone, the soft click of the guest room door shutting behind her echoing in the sudden, vast silence of the dark house.

Chase stood frozen, the taste of her still on his lips.

The fire spat another ember onto the hearth. He flinched.

He moved on autopilot, following his sister-in-law to her room.


He moved on autopilot, following his sister-in-law to her room.

The hallway was a canyon of darkness, the firelight from the living room fading to a dull orange glow that died at the threshold of the guest room door. His hand hovered near the knob. The wood felt cold under his fingertips. The house held its breath. All he could hear was the frantic drum of his own pulse in his ears and the distant, furious white noise of the storm.

We can’t. She’s my sister.

The thought was clear, grammatical, a perfect sentence of reason. It had no weight. It was paper against the gale-force wind of his want. Megan’s face surfaced in his mind, her smile precise, her eyes trusting. It was swiftly buried under the memory of Aubrey’s mouth, the feel of her heartbeat through his shirt, the unvarnished want in her whispered oh, god.

He turned the knob. It was unlocked. It gave with a soft, definitive click.

The room was darker than the hall, lit only by the violent blue-white flashes of lightning through the window. In each stutter, he saw her. Sitting on the edge of the bed, back straight, waiting. She’d taken off the sweatshirt. She was just a shape in the fleeting light, the pale curve of her shoulders, the dark fall of her hair.

“Close the door,” she said. Her voice was flat. A command.

He did. The sound sealed them in. The storm became a movie playing on mute behind thick glass.

“Aubrey—”

“Don’t.” A flash illuminated her, cutting him off. Her eyes were wide, serious, stripped of their usual sly humor. “Don’t talk. If we talk, we’ll think. If we think, we’ll stop.”

“We should stop.”

“I know.” She stood up. Another lightning strike captured her moving toward him, a study in contrast and shadow. “Do you want to?”

The question hung between them, enormous. It wasn’t about loneliness or boredom. It was a bare wire, live and dangerous. He could lie. He could turn, fumble for the knob, retreat to the cold sanctity of his marriage bed.

He didn’t lie. “No.”

That single syllable broke the last dam.

She closed the final distance, her hands finding his face in the dark. Her kiss was different now—not a surprise, but an inevitability. It was deep, hungry, a direct line to a part of him he kept shuttered. There was no hesitation in her touch. Her fingers threaded into his hair, pulling him closer as if she could absorb him. He groaned into her mouth, his hands sliding down from her shoulders, over the thin fabric of her tank top, tracing the dip of her spine. She was all real, urgent heat.

They stumbled toward the bed, a tangled, desperate knot of limbs. Clothing became a frustrating obstacle. His button-down shirt was shoved roughly from his shoulders. He peeled her tank top over her head, the static electricity making her hair crackle and stand in a dark halo for a second before it settled. The cold air of the room met the feverish heat of their skin. Every touch was amplified, every sigh a roar in the silent, storm-wrapped world.

There was no tenderness, only a furious, shared need to erase everything else. The guilt, the betrayal, Megan’s name—they burned it all in the crucible of this contact. He tasted salt on her skin, felt the desperate clutch of her legs around his hips, heard the broken, half-formed words against his neck that weren’t words at all, just sounds of need.

Aubrey didn't even ask him to use a condom, she knew there weren't any in the house, and in this moment, she didn't care.

Aubrey laid down on the bed and spread her legs invitingly.

Aubrey laid down on the bed and spread her legs invitingly. The storm flashed again, a strobing snapshot of her willingness, her certainty. Chase stood at the edge, a silhouette of hesitation against the window’s violent light.

“Chase,” she said, her voice low, stripping his name of any gentleness. It was just a fact.

The room was cold away from the fire, but the air between them burned. He could still feel the ghost of her lips, the brand of her fingers on his skin. Megan’s face flickered once more behind his eyes—her neat smile, the way she’d trustingly kissed his cheek goodbye at the airport. It dissolved like smoke. There was only this. This cold room, this warm girl, this point of no return.

He moved. He didn't think. He just followed the current.

His knees sank into the mattress. The springs groaned, a sound somehow more intimate than anything before. He could see her watching him, her eyes dark pools in the semi-darkness. No wink now, no playful smirk. Her expression was stark, open. She was giving him permission to wreck everything, and her silence was the loudest thing he’d ever heard.

He lowered himself over her. His weight settled, familiar and foreign at once. She gasped, a small, sharp intake of air that had nothing to do with surprise and everything to do with the sudden, shocking reality of him. Her thighs cradled his hips, her skin hot even through the layers of their remaining clothes. He braced himself on one elbow, his other hand finding the side of her face, his thumb tracing the arch of her cheekbone. Her breath came fast, misting in the cold air between their mouths.

Outside, the wind screamed, a relentless, mournful sound. In here, there was only the syncopated rhythm of their breathing, the rustle of fabric, the creak of the bed. He kissed her again, slower this time, a drowning man taking one last, deep breath. She met him with a desperation that mirrored his own, her hands sliding down his back, gripping the waistband of his jeans.

For a suspended second, he pulled back. His forehead rested against hers. Their noses brushed. He could see the faint, pale dusting of freckles across her cheeks, visible only this close. He’d never noticed them before.

“Aubrey,” he whispered, a plea and a curse rolled into one.

“Don’t say it,” she whispered back, her voice cracking. “Don’t say her name.”

He didn’t. Instead, he kissed her throat, felt the frantic flutter of her pulse against his lips. Her head fell back, exposing the line of her neck. A surrender. His hand slid down her side, over the dip of her waist, the flare of her hip. He hooked his fingers into the waistband of her leggings and the thin cotton of her underwear. She lifted her hips, a slight, urgent movement, helping him. He pulled them down in one fluid motion.

The cold air hit her skin. She shivered. Or maybe he did. The world telescoped down to this square of rumpled sheets, this fragile pocket of heat in the storm-dark house. He kicked free of his own jeans, the fabric catching on his ankles before he shoved them away.

They were bare to each other now. There was no going back to just looking, just wondering. The space for hypotheticals had evaporated. He looked at her, really looked, in the sporadic flashes of lightning. Her chest rose and fell rapidly. Her eyes were wide, fixed on him, holding a universe of defiance and fear. She reached for him, her hand closing around him, firm and sure. Her touch was an electric jolt, a confirmation.

He shifted, the movement instinctive, ancient. Her legs parted wider, an unspoken welcome. He positioned himself, the head of his cock pressing against her warmth. She was already wet. The reality of it, the sheer physical proof of her wanting him, stole his breath. Her eyelids fluttered closed for a second, then opened, locking onto his. There was no coyness left. Just a raw, terrifying honesty.

He entered her.

It was a slow, deliberate slide, a filling of a space he hadn't known was empty. She was tight, and hot, and she arched underneath him, a sharp gasp escaping her lips that turned into a low, shattered moan. He buried his face in the crook of her neck, breathing her in—coconut, graphite, sex. The scent of betrayal.

He began to move. A shallow rocking at first, then deeper. She matched his rhythm instantly, her hips rolling to meet his thrusts. There was no technique, no finesse. This was pure, brute need. Every push was an attempt to obliterate thought, to outrun the guilt that was already, inexorably, coiling in his gut. Her nails dug into his shoulders, sharp little points of pain that anchored him to the moment. The bedframe tapped a relentless, quiet beat against the wall, timed to the fury of the wind.

She was louder than he expected. Her sounds were unfiltered, grunts and gasps and half-words lost against his skin. He kissed her to swallow them, but she turned her head, letting them spill into the room. It was as if she wanted the house itself to bear witness. Her hands moved everywhere—his back, his ass, tangling in his hair, pulling him deeper into her, into the sin.

He could feel his own climax building, a tight, desperate coil in his lower belly. He tried to hold it back, to stretch this awful, perfect thing, but it was useless. She wrapped her legs higher around his waist, locking him in. “Don’t stop,” she panted, her voice ragged. “God, don’t you dare stop.”

He didn’t. He drove into her, harder, faster, the world dissolving into sensation and sound: her choked cries, the slap of skin, the storm’s roar, the relentless squeak of the bedsprings. The coil snapped. Pleasure detonated through him, white-hot and merciless, wracking his body. He groaned, a long, broken sound muffled against her shoulder, as he spilled himself inside her. Chase assumed that Aubrey, like his wife Megan, was on birth control. He was wrong. In fact, Aubrey was ovulating and fertile right now as he flooded her with his potent seed.

Aubrey didn't bother to stop him or tell him. Instead the next morning after the snow was cleared, she left without a word. Although, in her way out, she did swap her sister's birth control pills with placebos.

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