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The Sins of the Brother

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Aaron Bennett is a man ruled by logic. At twenty-eight, the sharp, analytical social worker has built a stable life with his husband, Dakota Bennett—a warm, funny, and fiercely devoted detective who would do anything to protect the people he loves. Then Dakota’s younger brother comes back to town. Zack Bennett is everything Aaron shouldn’t want—red-haired, guarded, and quietly magnetic. A mechanic with grease on his hands and secrets in his eyes, Zack unsettles Aaron in ways he can’t explain and shouldn’t explore. What starts as stolen glances and tense conversations turns into something far more dangerous. As Dakota’s latest case tightens around the family and buried truths begin to surface, Aaron finds himself trapped between loyalty and longing. Because falling for the wrong brother isn’t just betrayal— It’s a line that, once crossed, can never be undone

Chapter 6: The Uninvited Guest

The first Saturday of June smelled of charcoal and cut grass. Aaron stood at the patio doors, a bowl of potato salad sweating in his hands, and watched his husband laugh. Dakota was in his element, spatula in one hand, a local IPA in the other, holding court at the grill. Their friends were scattered across the backyard—Mel from the precinct arguing about baseball, a couple of neighbors lounging in cheap lawn chairs. Sunlight dappled through the oak tree, painting everything in warm, forgiving gold.Four months. Four months of meticulous rebuilding. Of scheduling couples’ counseling every Tuesday. Of having sex with Dakota on Thursday nights and Sunday mornings, a dedicated, conscientious effort that left Aaron feeling hollowed out and saintly. He’d memorized the script of his atonement. He was good at scripts.

Then the gate at the side of the house swung open.

Zack walked in as if he’d never left. As if he hadn’t vanished into a silent, textless void for a third of a year. He wore washed-out jeans and a black t-shirt stretched across his shoulders, a six-pack of cheap beer dangling from his fingers. His red hair was shorter, brighter against his summer-tanned skin.

Dakota’s face lit up with a joy so pure it physically hurt Aaron to witness. “You son of a bitch!” Dakota boomed, abandoning the grill to wrap his younger brother in a back-slapping hug. “You said you weren’t sure you could make it!”

“Got the truck running smooth,” Zack said, his voice a low rumble Aaron felt in his bones. He was looking at Aaron over Dakota’s shoulder. His eyes were flat, unreadable stones. “Figured I’d surprise you.”

The surprise was a cold knife sliding between Aaron’s ribs. He set the bowl down carefully, afraid his hands would shake.

The party flowed around the new current. Dakota was visibly brighter, louder, happier with his brother there. Zack held court at the rusted picnic table, telling stories about life on the road that made the neighbors laugh. Aaron moved through his hosting duties like an automaton—refilling chips, fetching ketchup, collecting empty bottles. Every pass near the table made the air feel thicker, harder to breathe.

During a lull, as Dakota was engrossed in a debate about burger technique, Aaron found himself forced to sit at the picnic table to eat. He was on the bench opposite Zack, a gap of worn wood between them. He focused on his plate, cutting a burger into tiny, precise pieces.

Under the table, a booted foot nudged his loafer.

Aaron froze, a bite halfway to his mouth. He didn’t look up.

The foot withdrew. Then, a denim-clad knee pressed firmly against his own. The contact was electric, illicit. Aaron jerked his leg away.

Zack took a slow pull of his beer, listening to someone’s story, his expression neutral. His hand, resting on the bench beside his thigh, disappeared below the tabletop. Aaron felt the rough knuckles brush against the fabric of his chinos, a deliberate, scorching graze along his inner thigh.

Aaron choked on nothing. He coughed, reaching for his water.

Zack leaned forward, elbows on the table, joining the conversation about a missed football call. His movement brought his mouth closer to Aaron’s ear. His voice, when it came, was a thread of smoke in the cheerful noise.

“You look tired, Aaron. Sleeping okay?” A beat. The knuckles pressed harder, higher. “Or you still lying awake thinking about it?”

Aaron’s face burned. He shoved his plate away, appetite gone. “Don’t,” he whispered, the word barely audible.

“Don’t what?” Zack’s hand withdrew. He sat back, smiling at something Mel said. But his eyes were on Aaron. They traced the line of his throat, the V of his polo shirt. “Just asking after my brother-in-law’s health.”

The afternoon bled on. The sun dipped, casting long, distorted shadows from the swing set. Dakota lit the fire pit, the orange flames lapping at the twilight. The party condensed, voices lower, more intimate. Aaron sat on a log, Dakota’s warm arm around his shoulders, feeling like a fraud carved from ice.

Zack was a shadow on the other side of the fire, the flame light carving hollows in his cheeks. He’d been mostly quiet, his gaze a constant, low-grade burn across the pit.

Aaron got up to get more firewood from the stack near the garage. The relative darkness away from the circle was a relief. He bent, gathering split logs into his arms.

A shape detached itself from the deeper shadows by the workbench. Zack.

He didn’t speak. He just walked up to Aaron, closing the distance in the humid, cricket-chirping dark. He stopped so close Aaron could smell the beer and smoke and him.

“Four months,” Zack said softly. “You pretend good.”

“He’s your brother,” Aaron hissed, clutching the logs to his chest like a shield.

“And you’re his husband.” Zack’s smile was a knife-cut in the gloom. “Didn’t stop you from coming on my cock in his shower, did it?”

The crude words were a physical blow. Aaron stumbled back a step.

Zack closed the distance again. He reached out, not for Aaron, but to tuck something into the front pocket of Aaron’s chinos. His fingers lingered, pressing the folded fabric against Aaron’s thigh. It was soft. Cotton.Aaron knew. He knew before Zack’s whisper, hot and venomous, filled his ear.

“You should’ve burned it,” he repeated, the words from the text given flesh. “But you just hid it. Like you hide everything. You’re still my dirty little secret, Aaron. You’ve got the stain to prove it.”

He stepped back, his expression shifting back to casual indifference as he turned toward the firelight. “Need a hand with that wood?” he called over his shoulder, his voice normal, friendly.

Aaron stood frozen, the weight of the stolen, soiled pillowcase in his pocket an anchor dragging him down to hell. He couldn’t move. He could only feel the ghost of Zack’s fingers on his thigh, the fabric proof of his betrayal pressing against his skin.

Later, much later, the guests were gone. Dakota, pleasantly drunk and beaming, was stacking dishes in the sink. “Great party, right? God, it was so good to see Zack.”

“Yeah,” Aaron said, his voice strange to his own ears. “Great.”

He climbed the stairs, his legs heavy. In the bathroom, he locked the door. With trembling hands, he pulled the folded square of fabric from his pocket. He didn’t want to look. He had to look.

He unfolded it. There, on the soft blue cotton, was the embroidered floral pattern he’d tried to forget. And there, marring it, was the faded but undeniable yellowish-brown stain. His stain. The evidence, returned to him.

A soft knock on the bedroom door downstairs. Dakota’s voice, muffled. “Babe? You coming down? I’m gonna hop in the shower.”

“Go ahead!” Aaron called, stuffing the pillowcase into the bottom of the laundry hamper, beneath a pile of towels. “I’ll be down in a sec!”

He heard Dakota’s footsteps head to their bedroom. Heard the distant groan of the plumbing as the shower turned on.

Aaron splashed water on his face. He stared at his reflection, a man trapped in a life that was no longer his. The scream was there, behind his teeth.He swallowed it down.

He walked downstairs, through the dark living room, toward the glow of the kitchen. He’d pour a drink. He’d wait for Dakota. He’d get through the night.

The door to the basement was ajar.

A sliver of yellow light cut across the hallway floor. It hadn’t been open before.Aaron stopped. His breath halted. He knew, with a certainty that chilled his blood, that he wasn’t alone on the first floor. The air changed, charged with a familiar, dangerous static.

He turned.

Zack stood in the doorway to the basement, backlit by the light from below. He must have slipped back inside. He’d never left.

“He’s in the shower,” Zack said, his voice a low rasp in the silent house. “Just like last time.”

“You need to go,” Aaron whispered, the words devoid of force.

Zack took a step forward.Then another. He crowded Aaron back into the dark alcove of the pantry, away from the kitchen light. The smell of him—outdoor air and a faint, sharp sweat—enveloped Aaron.

“You kept it,” Zack murmured, his mouth hovering near Aaron’s temple. “You hid it, but you kept it. You like having it. A little piece of what we did.”

“No.”

“Liar.” Zack’s hand came up, palm rough against Aaron’s jaw, forcing him to meet his eyes. “You’ve been dying for four months. Playing house. It’s killing you.”

Aaron tried to shake his head, but Zack’s grip was firm. The truth of it was a weakness that seeped from his pores. He was dying.

“I can smell it on you,” Zack breathed, moving closer, his body a solid, heat-radiating wall against Aaron. “The wanting.”

From upstairs, the steady drum of the shower continued. A world away.

Zack’s other hand went to the front of Aaron’s chinos. He popped the button. Slid the zipper down. The sound was obscenely loud.

“Zack, don’t—”

“Don’t?” He shoved his hand inside, past the waistband of Aaron’s briefs, and took him in a hard, confident grip. Aaron was already half-hard, his body betraying him utterly. “Your mouth says don’t. This,” he gave him a punishing squeeze, “says please.”

Aaron’s head fell back against a shelf with a thud. A whimper escaped his lips. He was rock solid in Zack’s hand, throbbing with a shameful, overwhelming need.

“That’s what I thought,” Zack growled. He spun Aaron around, facing him toward the dark pantry. He yanked the chinos and briefs down to Aaron’s knees in one brutal motion. The cool air on his exposed skin was a shock.There was no preparation. No patience. Zack spat into his own hand, the sound crude and wet in the dark. He smeared it over himself, then pressed the thick, insistent head of his cock against Aaron’s entrance.

“He’s right upstairs,” Zack whispered, a hot, terrible promise against Aaron’s ear. “He’s singing. You hear him?”

Dakota’s faint, off-key voice drifted down the stairwell, muffled by water and walls.

A sob caught in Aaron’s throat. This was worse. This was so much worse.

Zack pushed inside.

The burn was immediate, a sharp, tearing stretch. Aaron bit down on his own fist to silence the cry. He was too tight, too dry. Zack didn’t care. He worked himself in with slow, relentless, brutal increments, filling him with a burning, undeniable presence.

“Fuck,” Zack hissed, finally seated to the hilt, his body flush against Aaron’s bare thighs. “Still so fucking tight for me.”

He began to move. Short, deep, punishing thrusts that stole Aaron’s breath. Each one drove him forward, his hands scrabbling against shelves of canned goods and pasta boxes. The rhythm was merciless, a raw, animal claiming. The physical pain was a bright, clarifying fire that burned away the pretense, the guilt, the four months of lies. This was all he was. This taking, this violation.

Zack’s hand fisted in his hair, yanking his head back. “You love this,” he rasped, his thrusts becoming harder, faster. “You love that he’s right there. That I’m fucking his husband in the dark like you’re nothing. Like you’re mine.”

It was true. God help him, it was true. The pleasure coiled, sick and undeniable, deep in his gut, intertwined with the pain and the terror. He was going to come. From this. From the sheer, degrading wrongness of it.

“Yes,” Aaron gasped, the confession torn from him. “Yes, I love it.”

Zack released his hair, his hand sliding around Aaron’s hip, fingers digging into the tender flesh. His other hand clamped over Aaron’s mouth, stifling the ragged, broken sounds being punched out of him with every thrust. The smell of his own skin, of Zack’s calloused palm, filled his nostrils.

The pace became frantic, a desperate, driving race. The pantry door rattled on its hinges with their force. Zack was breathing in harsh, open-mouthed grunts against Aaron’s neck.He was close.

“Come,” Zack ordered, his voice shattered. “Come all over your nice, clean shelves.”

The command, the filth of it, the proximity of Dakota’s voice—it detonated Aaron’s control. His orgasm ripped through him, violent and silent, spilling onto the pantry floor in helpless, pulsing stripes. His body clamped down, milking Zack, who drove in one final, deep time and froze. A raw, choked sound was torn from Zack’s throat as he came, his hips jerking erratically, flooding Aaron with a final, scalding rush of possession.

They collapsed against the shelves, panting in the dark. The shower had stopped upstairs. The house was silent.

Zack pulled out. Aaron winced at the sudden, aching emptiness, the cold air on his wet skin. He heard the soft rustle of clothing as Zack tucked himself away.

For a moment, there was only the sound of their ragged breathing. Then, Zack leaned close, his lips brushing Aaron’s sweat-damp ear.

“The pillowcase is just the proof,” he whispered, his voice eerily calm now. “I’m the stain, Aaron. And you can’t wash me out.”

Footsteps retreated down the hallway. The back door opened and shut with a soft, definitive click.

Aaron slumped to the floor, his pants around his ankles, amid the scattered cans he’d knocked from the shelf. He stared into the darkness, the scent of sex and spaghetti oats thick in the air. From upstairs, he heard Dakota’s footsteps padding into the bedroom, whistling.

He pulled up his pants with numb fingers. He found a roll of paper towels and wiped the floor, his movements mechanical. He disposed of the evidence in the kitchen trash, under coffee grounds and burger wrappers.

Then he stood at the sink, washing his hands over and over, watching the water spiral down the drain. He scrubbed until his skin was raw.

But he could still feel it. The deep, throbbing ache. The phantom weight of Zack inside him. The words etched into his bones.

You can’t wash me out.

Upstairs, Dakota called his name, his voice warm and loving.“Aaron? You okay down there?”

Aaron turned off the tap. He looked at his reflection in the dark window over the sink. A stranger stared back.

“I’m okay,” he called back, his voice perfectly, horribly normal.“Just cleaning up. I’ll be right there.”

Aaron climbed the stairs, each step a monument to his own silence. The water from the sink still beaded on his wrists, a false cleanliness. He could hear Dakota humming in the bedroom, the tune blissfully unaware. The door to their room was ajar, a slice of warm light cutting into the dark hall.

He pushed it open.

Dakota stood by the dresser, shirtless, pulling a clean white t-shirt over his head. His skin was still pink from the shower, his hair damp and curling. He smiled, a genuine, easy thing that pierced Aaron straight through the chest. “There you are. Thought you got lost in your own kitchen.”

“Just…” Aaron’s voice caught. He cleared his throat, stepping inside, letting the door swing shut behind him. The room felt like a set from a play he’d forgotten his lines to. “Just took a while.”

“It was a good day,” Dakota sighed, content, collapsing onto the bed. He patted the space beside him.“Really good. Having Zack here… it felt right, you know? Like things are finally settling.”

Aaron didn’t move from his spot by the door. He felt the phantom ache deep in his body, a throbbing counter-rhythm to Dakota’s words.Settling. The stained pillowcase was a hidden tumor in the hamper. Zack’s cum was leaking inside him right now.

“Yeah,” Aaron said. “Settling.”

Dakota’s smile softened, his detective’s eyes noticing the stiff posture, the thousand-yard stare. “You okay, Aaron? You seem… off.”

I just got railed in our pantry by your brother while you sang in the shower. The truth was a concrete block in his throat. He managed a weak approximation of a smile. “Long day.Just tired. All the people.”

“Come to bed,” Dakota said, his voice warm, inviting. He believed the lie. He always believed the lies. This trust was the final, unendurable cruelty.

Aaron walked to the bed. He stripped to his boxers, his back to his husband. He could feel the sticky, dried proof on his inner thighs. He slid under the covers, lying rigidly on his side, facing the window.

Dakota’s arm curled around his waist, pulling him close. His front fitted against Aaron’s back, a loving mirror of the violent embrace from minutes before. Dakota nuzzled his neck. “Love you,” he murmured, sleep already thickening his voice.

Aaron stared into the darkness. “Love you too.”

He lay there for hours, listening to Dakota’s breathing even out into sleep. The words played on a loop in his skull. I’m the stain. And you can’t wash me out. They weren’t just words. They were a diagnosis. The party, the pantry—they weren’t relapses. They were revelations.This was his condition. This was his truth.

As the first grey light of dawn bled around the blinds, the paralysis broke. A cold, clear purpose crystallized. He couldn’t live inside this lie for another day. It wasn’t about Dakota anymore. It was about the thing festering between him and Zack, a thing that needed to be lanced, seen, and named in the light.

He carefully extracted himself from Dakota’s arm. He dressed in yesterday’s chinos and a sweatshirt in the dark. He didn’t write a note. Notes were for errands, for explanations. This was beyond explanation.

He knew where Zack was staying. A cheap motel off the highway, the one with the flickering neon sign he’d mentioned in passing months ago. The Mayfair Motor Lodge.

The drive was a blur of empty streets and silent radio. The world was asleep. He parked in the cracked lot, his old sedan looking alien among the pickup trucks and aging sedans. Room 114. The number was burned into his memory from a scrap of mail he’d seen once.

He didn’t knock. He pounded on the door with the side of his fist, the sound explosively loud in the quiet morning.Silence. Then movement. Slow, heavy footsteps.

The door swung inward.

Zack stood there, bare-chested, wearing only low-slung sweatpants. His hair was mussed from sleep, a faint stubble shading his jaw. He looked younger, softer in the weak light, but his eyes were the same: watchful, guarded, immediately alert. He didn’t look surprised.

“You,” Aaron said, the single word ripped from a place of raw, untended hurt.

“Me,” Zack echoed, his voice a gravelly rumble. He didn’t move to let him in. He just filled the doorway, a barrier and an invitation.

“This ends. Now.” Aaron’s voice trembled, but not from fear. From a fury so vast it had finally cracked him open. “You don’t get to walk into my life and shit all over it. You don’t get to touch me when he’s in the next room. You don’t get to put your fucking… your fucking souvenirs in my pocket.”

Zack’s gaze swept over him, taking in the tremor in his hands, the wildness in his eyes. A slow, knowing smirk touched his lips. “Couldn’t sleep, huh?”

“Stop it!” Aaron shouted, the sound echoing across the lot. “Stop with the fucking games!What is this? What do you want from me?”

The smirk vanished. Zack’s expression flattened into something stark and serious. He stepped back, opening the door wider. “You wanna have this conversation out here for the whole world? Or you wanna come in?”

Aaron stood his ground for a three-count heartbeat. Then he shouldered past him, into the room.

It smelled of cigarette smoke and cheap laundry detergent. The bed was unmade, sheets tangled. A duffel bag yawned open in the corner, spilling greasy clothes. It was a portrait of transience. Zack closed the door, sealing them in the dim, close space.

“You asked what I want,” Zack said, leaning against the wall by the door, arms crossed. “You stood in your perfect kitchen with your perfect husband and you looked at me like I was a virus. From the first day. You were so fucking scared of what you saw.”

“I wasn’t—”

“You were.” Zack pushed off the wall, taking a step closer. The air compressed. “You looked at me and you saw everything you’d never let yourself be. Everything dirty and real and not fucking… curated. It pissed you off. It turned you on. Same thing, for you.”

Aaron recoiled as if struck. “That’s not true.”

“Isn’t it?” Zack was in front of him now, too close. Aaron could see the faint scar above his eyebrow, the tired lines at the corners of his eyes. “You think I forced you? In the shower? In the pantry? You were begging for it before I ever touched you. With every tight-assed, judgmental look.”

The truth of it was a gut-punch. Aaron’s anger deflated, leaving a hollow, shameful cavity. He sank onto the edge of the unmade bed, the fight gone. “Why him?” he whispered, staring at the stained carpet. “Why Dakota?He loves you. He’s never done anything but love you.”

For the first time, something flickered in Zack’s eyes—a pain so quick and deep Aaron almost missed it. He looked away, jaw working. “Dakota lives in a world of right and wrong. Good guys and bad guys. He’s a fucking detective. He finds the stain, he removes it. He doesn’t understand that some stains… they’re part of the fabric.”

He lit a cigarette, the flare of the match illuminating the harsh planes of his face. “You think I wanted this? To want my brother’s husband?” He blew smoke out sharply. “You’re the worst fucking thing that could have happened to me. You and your clean house and your analyzed feelings. You’re a goddamn trap.”

The raw admission hung in the smoky air. It wasn’t a declaration of love. It was a confession of mutual ruin.

Aaron looked up at him. “So what now? We just keep doing this? Destroying everything until there’s nothing left?”

Zack took a long drag. He studied Aaron, his eyes tracing the exhaustion, the defeat, the lingering, helpless want. “I don’t know,” he said, his voice quiet now, stripped of its armor. “But you came here.To me. Not to him.”

He stubbed the cigarette out in an overflowing ashtray. The finality of the gesture snapped the last tense thread between them.

In two strides he was there. He didn’t kiss him. He grabbed a fistful of Aaron’s sweatshirt and hauled him up, then shoved him back down onto the bed. This wasn’t about tenderness. It was a collision.

Zack yanked the sweatshirt over Aaron’s head, then his own sweatpants down. His cock was already hard, heavy and ruddy in the dull light. He pushed Aaron’s knees apart, kneeling between them. There was no pretense, no seduction. Just a grim, shared necessity.

He spat into his palm, slicking himself roughly. He lined up, the blunt head pressing against Aaron, who was still sore, still raw from hours before.

“This is what we are,” Zack growled, and pushed in.

The burn was immediate, a sharp, breathtaking rip of sensation that made Aaron cry out, his back arching off the motel sheets. He was too dry, too used. Zack didn’t stop. He sank in with a single, relentless thrust, burying himself to the hilt in a deep, unforgiving stretch.

“Fuck,” Zack hissed, his head dropping forward, his body trembling with the effort of holding still. “Christ, you’re tight.”

He began to move, a slow, punishing drag out and a hard slam back in. It was a fuck devoid of pleasure, all friction and ache and a terrible, consuming closeness. Each drive punched a gasp from Aaron’s lungs. His fingers clawed at the cheap sheets, his legs wrapping around Zack’s hips to pull him deeper, to make the hurt mean something.

Zack fucked him with a desperate, focused intensity, his eyes locked on Aaron’s face. Watching every flinch, every grimace. His thumb brushed roughly over Aaron’s bottom lip. “This what you came for?” he rasped, his rhythm becoming harder, faster. “This the conversation you wanted?”

Aaron could only nod, tears of pain and release leaking from the corners of his eyes. He was hard between their bodies, trapped, rubbing against Zack’s abdomen with every thrust.

Zack shifted, hooking his arms under Aaron’s knees, pushing them back towards his shoulders. The angle changed, going devastatingly deep. Aaron screamed, a short, sharp sound swallowed by the room.

“Yeah,” Zack grunted, his control fraying. “Scream. Let it out. All that perfect, quiet bullshit.”

His pace became erratic, brutal. The bed frame knocked a steady, frantic beat against the wall. Zack was chasing his end, using Aaron’s body to punish them both. He reached between them, his calloused hand fisting Aaron’s cock, jerking him in time with his thrusts. The dual sensation was too much—the brutal fullness, the rough friction on his cock.

Aaron came with a shattered sob, his release striping his own stomach and Zack’s in hot pulses. His body clenched violently around Zack, who swore, his hips stuttering once, twice, before he drove in one last time and held. A low, gut-deep groan was torn from him as he emptied himself, his whole body rigid, then collapsing onto Aaron, a suffocating weight of sweat and heat and spent violence.

They lay like that for a long time, a tangled, breathing mess. The neon sign outside flickered, casting a pink wash over the room.

Zack finally rolled off, onto his back. They stared at the water-stained ceiling together.

“I’m leaving,” Zack said, his voice quiet. “Today. Got a line on a job upstate.”

Aaron didn’t ask him to stay. He just watched the cracks in the ceiling. “Okay.”

“It doesn’t fix anything,” Zack said.

“I know.”

Another long silence. A truck rattled past on the highway.

“The pillowcase,” Aaron said. “I burned it. This morning. Before I came here.”

Zack turned his head on the pillow. He looked at him, really looked at him, for what felt like the first time. He gave a slow, almost imperceptible nod. An acknowledgment.A farewell.

Aaron got up. He dressed in silence, every movement aching. He didn’t look back as he opened the door. The morning light was too bright, hurting his eyes.

He could feel Zack’s gaze on his back until he reached the car. He could still smell him on his skin.

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