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The Family's Omega

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Becoming The Family's Omega Elliot, a beta, doesn't know what's going on with him; his abdomen has been cramping, and recently he's started noticing the way his alpha brothers and dad smell. Not to mention their long, thick cocks. Before he's wrapped his mind around what is going on, Elliot finds himself fully presented as an omega, and now he's going into heat too! Thankfully, his brothers and dad are there and more than willing to claim the new omega for their own. (Elliot is 20 y. o. and very attached to his alpha big brothers) Includes: MMM/M, ABO, Cockwarming and Body modification (turning beta brother into omega through cockwarming - but he’s totally into it), Mpreg 🫤 All characters are over 18.

Chapter 1: A Kitten in the Den

The living room was a cave of amber light and lingering warmth. A single lamp cast a soft glow through sheer curtains, pooling on the cluttered coffee table where two whiskey glasses, their ice long melted, sat beside a scattered chessboard. The air hung heavy with the scent of aged leather from the worn sofa, layered with something sharper, muskier—the ghost of bodies that had just left the room.

Elliot was a shadow curled on the rug before the couch, asleep. His soft brown hair fell across his forehead, his breaths shallow and even. He’d been reading, but the dense quiet of the house and the low thrum of the furnace had pulled him under. He looked smaller like this, a slight figure in a too-big sweater, fingers loosely curled near his face.

The front door opened and closed, followed by the heavy tread of boots being kicked off.

“He’s out cold,” Lucas’s voice, warm and amused, drifted in from the hallway.Nathan’s deeper murmur followed. “Long day.”

They moved into the living room, their presence immediately altering the space. Nathan, the oldest at twenty-six, filled the doorway first. His dark hair was cropped close, his green eyes scanning the room before landing on Elliot.His broad shoulders seemed to absorb the lamplight. Lucas followed, his chestnut hair tousled from the wind, a playful glint in his amber eyes as he nudged Nathan’s arm.“Game?” Lucas asked, already moving toward the console.

“In a minute.” Nathan crossed the room, his movements efficient and silent. He crouched by Elliot, his gaze softening. For a moment, he just watched the steady rise and fall of his little brother’s chest. Then, with a tenderness that belied his size, he slid his hands under Elliot’s shoulders and knees.

Elliot stirred, a faint whine escaping his lips as he was lifted.He was all loose limbs and sleep-softened weight.“Shh. Got you,” Nathan murmured, his voice a low rumble against Elliot’s temple. He carried him the few steps to the sofa and settled into the corner, not putting Elliot down beside him, but arranging him across his lap.Elliot’s head lolled against Nathan’s solid chest.

Lucas chuckled softly, dropping onto the other end of the couch. “Making a pillow out of you, Nate.”

“He’s always been clingy in his sleep,” Nathan said, but there was no annoyance in it. His hand came up, large and warm, to splay across Elliot’s back, holding him secure.

Elliot nuzzled deeper, his face pressing into the soft cotton of Nathan’s t-shirt. He was floating in that hazy place between sleep and wakefulness, surrounded by a familiar safe scent—clean sweat, the faint, sharp note of deodorant, and something deeper, an earthier musk that was purely Nathan. It wrapped around him, seeping into his lungs, making his bones feel liquid.He made another soft sound, a contented sigh, and shifted. His hand came up, fingers curling loosely into the fabric over Nathan’s stomach. He could feel the hard plane of muscle beneath.

Lucas stretched his arm along the back of the couch, his fingers brushing Elliot’s ankle. “He’s like a little furnace.”

“Mmm.” Nathan’s agreement was a vibration Elliot felt through his whole body.Still mostly asleep, Elliot turned his head. His cheek now rested against the hard seam of Nathan’s jeans, right at the juncture of his thigh.The denim was warm, almost hot, from Nathan’s body heat. A new, more potent scent drifted up, musky and alpha-rich, cutting through the last cobwebs of sleep.Elliot’s breathing hitched, just slightly. He didn’t understand why his heart was beating a little faster, why he felt a sudden, quiet urge to press closer. He shifted again, his nose now brushing against the texture of Lucas’s gym shorts where his thigh was just inches away. That scent was different—lighter, with a sweeter, woodsy undertone, but no less compelling.“Look at him,” Lucas whispered, his voice dropping. “Sniffing around like a pup.”

Nathan’s hand stroked down Elliot’s spine, a slow, possessive drag of his palm. “He’s just comfortable.”

But Elliot wasn’t just comfortable.He was swimming in it.The heavy, protective weight of Nathan’s arm. The teasing brush of Lucas’s fingers on his leg. The intoxicating, confusing smells of them—sweat and skin and something profoundly male that made a low, unfamiliar warmth pool in his belly. He felt pliant, boneless, a deep-seated trust allowing him to seek the contact his waking self might shy from.The staircase creaked. Caleb bounded down, shirtless, his body damp from a workout. He stopped short at the edge of the living room, his sharp blue eyes taking in the scene: Nathan with Elliot curled on him, Lucas looking on with a lazy, proprietary smile.

“Party and no one told me?” Caleb’s voice was light, but his gaze was fixed on Elliot.“He was asleep on the floor,” Nathan said.

Caleb, at twenty-two, moved with an eager energy the older two had tempered. He crossed the room and didn’t ask.He just leaned down and scooped Elliot up from Nathan’s lap. Elliot mumbled a faint protest, his hands flailing momentarily before finding purchase on Caleb’s bare shoulders.

“Hey, I had him,” Nathan grumbled, but there was no real heat in it.

“My turn. I rarely get to cuddle him,” Caleb said, settling back onto the middle cushion with Elliot now rearranged in his lap. Elliot instinctively curled into him, his face burying itself against Caleb’s chest. Caleb’s skin was cool and smooth, still carrying the musky scent of sweat, but beneath it was the same vibrant, sun-warmed alpha scent, tinged with youthful urgency. Elliot breathed it in, and his whole body relaxed anew.

“See?” Caleb said, his voice hushed with awe as he looked at his brothers.His hands came up to circle Elliot’s back. “He’s like… he’s never like this awake.”

“He’s getting too big to be carried around like a kid,” Lucas said, but his tone was teasing. Caleb’s arms tightened possessively. “He fits just fine.”

Caleb’s chuckle was a soft rumble beneath Elliot’s ear. “Yeah, you fit.” His hands, calloused from weights, smoothed up Elliot’s back, a slow, firm pressure that seemed to melt Elliot’s spine. Elliot murmured something unintelligible, his body growing heavier, more pliant in Caleb’s grasp. The world narrowed to this: the steady beat of Caleb’s heart, the salt-damp skin under his cheek, the intoxicating, sweaty musk that was pure Caleb.It was deeper here, concentrated.

As Caleb relaxed into the cushions, he gently guided Elliot’s slumping form downward. Elliot, sleepy and docile, melted against Caleb. Caleb let his body slip down, his head now resting on Caleb's sweaty abs with a blond trail of pubes leading into the waistband of his sweaty gym shorts beneath Elliot's head. The crisp hair tickled Elliot’s temple, a strangely intimate texture. Heat radiated from Caleb’s stomach, a furnace that seeped into Elliot’s very core. He nuzzled instinctively, his nose brushing the damp waistband, and the scent there was overwhelming—alpha, musky, raw. A sharp, sweet twinge, like honeysuckle cut with lightning, shot through his own gut.

From above, Lucas watched, his amber eyes darkening. “He’s really out of it,” he said, his voice lower than before.

“Long day,” Nathan repeated, but this time the words held a new weight. He was leaning forward, elbows on his knees, gaze intent on the way Elliot’s lips parted slightly, his breath ghosting over Caleb’s skin.

Caleb’s fingers tangled in Elliot’s soft brown hair, stroking with a rhythmic possessiveness. “You okay down there, El?”

Elliot could only manage a drowsy hum.He was more than okay. He was anchored. The pressure of Caleb’s body beneath him, the scent, the firm hand in his hair—it all quieted a restlessness he hadn’t even known was churning inside him. A deep, pleasant warmth spread through his limbs, a liquid relaxation that made him want to purr.

Lucas reached over and brushed a thumb over Elliot’s flushed cheek. “Feels a little warm, Cal.”

“Just sleepy,” Caleb murmured, but his breathing had deepened. Elliot could feel the rise and fall of his abdomen more pronouncedly now. The blond trail of hair tickled Elliot’s cheek, Caleb's unique alpha scent stronger there. Elliot snuggled against Caleb's sweaty abs, making more of Caleb's pubes peek from the waistband in the process, strengthening the comforting, dominant scent of his dear big brother.

Nathan chuckled then turned back to the game on TV. “He’s not usually this pliant.”

“He’s never been this cuddly,” Caleb agreed, his voice thick. “It’s nice.”

Caleb’s hand stilled in Elliot’s hair for a moment, then resumed its slow, rhythmic stroke. Elliot sighed, the warm puff of air ghosting across Caleb’s sweat-damp skin. He turned his head, his cheek pressing flush against the hard ridges of Caleb’s abdomen. The soft cotton of his sweater rucked up, and Caleb felt the direct heat of Elliot’s skin through the thin fabric of his own gym shorts—a startling, intimate point of contact.

“You’re all tense, El,” Caleb murmured, his voice a low rumble Elliot felt more than heard.“Just relax. I got you.”

Elliot’s response was another nuzzle, a slow, deliberate drag of his face downward. His nose traced the defined line of Caleb’s hip bone, bumping against the worn elastic of the waistband.Caleb’s breath hitched. The casual affection was tipping into something else, something deeper and more physical than just brotherly comfort. He watched the crown of Elliot’s head, the way his soft brown hair feathered against his tanned stomach, and a fierce, tender possessiveness swelled in his chest.This, Caleb thought.This is how it should be. He’d always been Elliot’s shadow, two years apart but inseparable since childhood, sharing bunk beds and secrets.Nathan and Lucas had their age and authority, but Caleb had proximity. He had shared after-school snacks and stupid inside jokes. He saw the way Elliot curled into Nathan’s protective bulk, the way he laughed at Lucas’s teasing, but here, now, Elliot was choosing him.Curling into his lap, seeking solace against his skin. It felt like winning.Elliot nuzzled again, deeper. His face was now half-buried in the waistband of Caleb’s shorts. A few strands of fine, blond hair, darker where damp with sweat, curled just above the fabric. Elliot’s nose brushed them, and he inhaled, slow and deep.Caleb felt the pull of that breath right down to his groin. A jolt of heat, purely alpha and possessive, shot through him. He knew what Elliot was smelling: salt, clean sweat, the sharp, clean scent of his soap, and beneath it, the deeper, musky signature of alpha.Of him.He loved it. Loved seeing Elliot so pliant, so vulnerable and trusting. His little brother was usually a ball of quiet, observant energy, but never this… this openly needy. Caleb’s thumb stroked the shell of Elliot’s ear. He assumed it was just exhaustion, maybe a rough day at college, making Elliot seek the familiar, protective embrace of his brothers. He was an alpha, after all; providing comfort, being a pillar, was his role. The fact that Elliot was pressing his face right into the most alpha part of him—the source of that dominant scent—felt instinctively right to Caleb. It was Elliot acknowledging the hierarchy, seeking security in his strength.

“He’s really going for it,” Lucas said quietly, his playful tone edged with something more observant.

Nathan didn’t look away from the TV, but his jaw was tight.“He’s sleeping.”

“Is he?” Lucas countered.

Caleb ignored them, focusing on the weight in his lap. Elliot shifted, letting out a soft, almost imperceptible whimper.It wasn’t a sound of distress. It was one of profound seeking.His lips, parted in sleep, grazed Caleb’s skin just below his navel. The contact was electric. Caleb’s stomach muscles clenched involuntarily, and Elliot made a small, pleased sound at the movement, pressing closer as if to feel it again.

A wave of pure, protective adoration washed over Caleb, so intense it stole his breath. This was his Elliot.His to hold.His to soothe. The others could have their turns, but in moments like this, Caleb felt like the most important person in his brother’s world. He let his head fall back against the couch, closing his eyes, savoring the feeling of Elliot’s affectionate, unconscious exploration and the fierce, loving claim it sparked in his own heart.

Elliot’s hand, which had been resting limply on Caleb’s shoulder, slid down. His fingertips curled, not gripping, but simply resting against the sharp cut of Caleb’s oblique. Another deep, shuddering sigh escaped him, his body going utterly lax, as if he’d finally found exactly what he was searching for in the heat and the musk and the solid reality of his brother beneath him.

Caleb opened his eyes, meeting Lucas’s knowing gaze across the dim room. A silent communication passed between them, something old and fraternal and slightly charged.Caleb didn’t care. He just tightened his arm around Elliot’s back, pulling him even closer, sealing the moment as his own.“You’re gonna smother him,” Nathan said, his voice gravelly.

“He likes it,” Caleb whispered back, and it was the truth. "Looks like he needs some comfort, I can't deny him that as his big alpha brother."

The silence after Caleb’s words wasn’t empty.It thrummed. Nathan’s gaze, sharp as shards of bottle glass, cut from the football highlights on the screen to the back of Elliot’s head, then up to Caleb’s defiant face. Lucas just watched, a slow smile playing on his lips, his thumb still making absent circles on Elliot’s ankle.They both heard it. The quiet conviction in Caleb’s voice wasn’t just brotherly concern. It was a statement of fact, an alpha recognizing a need and meeting it without question.They respected that.

Nathan gave a single, almost imperceptible nod, his green eyes darkening before he turned back to the game. Lucas’s smile widened, a flash of teeth.“Course you can’t,” he murmured, his voice a low rasp. “He’s all over you.”

He was. Elliot had gone past boneless into something else entirely. A deep, thrumming warmth was spreading from his core, a lazy honeyed heat that made his fingers and toes tingle. Every breath filled him with Caleb—sweat, skin, that dark blond musk that seemed to emanate from right beneath his cheek. It was better than the softest blanket, more comforting than any childhood nightlight.He felt… safe. And something else. A quiet, burgeoning ache, a hollow feeling that the warmth and the scent and the solid muscle under him was both soothing and intensifying.

A quiet, burgeoning ache, a hollow feeling that the warmth and the scent and the solid muscle under him was both soothing and intensifying. It was a knot of want with no name, tightening low in his belly with every breath of alpha musk he drew in.

“Alright, pup.” Caleb’s voice was rough above him, a vibration through his chest that Elliot felt in his teeth.“You’re turning into a dead weight. Up you get.”

Strong hands gripped his shoulders, intending to lift him off. Elliot made a noise—a soft, desperate whine that was entirely involuntary—and clung tighter. His fingers pressed into the firm flesh of Caleb’s sides. He wasn’t thinking; his body was just reacting, refusing to sever the contact that felt like a lifeline.Caleb stilled. A beat of silence passed, charged and heavy.Elliot felt the deep inhale Caleb took, the expansion of his ribs.

“He’s not having it,” Lucas observed from the other couch, his tone laced with a knowing amusement.“El.Come on.” Caleb tried again, his tone gentle but firm. “Let go. Bedtime.”

But Elliot only buried his face deeper, the wiry blond hair of Caleb’s happy trail brushing against his parted lips. The scent here was overwhelming, primal, and it short-circuited any remaining coherence. He shook his head, a minute movement against Caleb’s skin.Nathan muted the television.The sudden quiet was profound. All three alphas were looking at him now, their focus a tangible pressure.Elliot felt exposed, but he couldn’t make himself move.

“Jesus,” Caleb breathed, not in annoyance, but in something like awe. He looked at his older brothers, a question in his sharp blue eyes. Nathan gave another of those nearly imperceptible shrugs, a silent abdication. Lucas just raised his eyebrows, as if to say, You started this.“Fine. Okay,” Caleb murmured, his hands shifting from Elliot’s shoulders to slide under his back and thighs. “You win.”

In one smooth, powerful motion, Caleb rose from the couch, taking Elliot with him. Elliot gasped, his arms flying up to loop instinctively around Caleb’s neck as the world tilted. Caleb adjusted his grip, one arm banding securely under Elliot’s thighs, the other across his back, holding him aloft with effortless strength. Elliot’s legs, reacting to the secure lift, curled loosely around Caleb’s bare waist, his heels locking at the small of Caleb’s back.

He was being carried like a child, but there was nothing childish about the current thrumming through him. Caleb was all heated, sweat-damp skin and corded muscle. Elliot’s head found the hollow of Caleb’s shoulder, his nose pressing into the salty, damp skin of his neck. The alpha scent here was even stronger, layered with the clean sharpness of soap and the pure, virile musk of Caleb himself. He nuzzled there, inhaling shakily, and felt Caleb’s throat work against his forehead.

“Clingy little thing tonight, aren’t you?” Caleb’s voice was a low murmur meant only for him as he turned toward the hallway. His steps were sure and steady, the movement a gentle rocking that lulled Elliot deeper into his docile state.

The journey to their shared bedroom was a blur of shadowed hallway. Elliot was aware of the heat between them, the way his own body seemed to mold perfectly against Caleb’s. He was pliant, trusting, every ounce of resistance dissolved in the haze of his need for proximity. He kept snuggling, small, unconscious shifts of his head and cheeks against Caleb’s shoulder, as if trying to absorb him through his skin.

Caleb shouldered their bedroom door open. The room was dark, lit only by the sodium-glow of the streetlight filtering through the blinds. It smelled of them—laundry, old books, the faint, comfortable scent of two shared lives.

He walked to Elliot’s bed and stood beside it. “Alright, touchdown.”

But when Caleb tried to bend, to deposit him onto the rumpled sheets, Elliot’s body locked. His legs tightened their hold around Caleb’s waist.His arms constricted around his neck. A soft, distressed sound escaped him, muffled against Caleb’s skin.“Elliot. Let go.” Caleb’s command was gentle, but firm.Elliot shook his head again, a frantic little motion. The thought of the cool sheets, the empty space, the loss of this all-encompassing heat and scent was unbearable.The hollow ache in his core pulsed, suddenly acute.

Caleb sighed, a fond exhalation.He straightened back up, standing in the dim room with his brother wrapped around him. He shifted his grip, trying to peel Elliot’s arms from his neck. Elliot just clutched harder, his breath coming faster.“Hey.Shhh.” Caleb’s tone softened. He began to move, a slow, subtle rocking from side to side. His large hand came up and cupped the back of Elliot’s head, fingers sinking into the soft brown hair. He petted slowly, rhythmically.“It’s okay.I’ve got you. Just relax.”

The pressure of Caleb’s hand was magical. Combined with the deep, rumbling alpha timbre of his voice, it sent waves of submission through Elliot’s nervous system. The frantic tension began to leach from his muscles.Caleb felt the change. He brought his other hand up and stroked it slowly, firmly, down the line of Elliot’s spine, over the fabric of his sweater. Down, then up again.A deliberate, calming gesture.“That’s it.Just go loose. I’m right here.”

Down.Up. The petting on his head, the stroking down his back.Elliot’s eyelids fluttered. The fight drained out of him, replaced by a profound, heavy lassitude.His grip on Caleb’s neck slackened. His legs slipped, sliding down Caleb’s hips until his feet brushed the floor, though he still leaned heavily against him.“Good,” Caleb whispered. He guided Elliot’s now-limp form the last few inches onto the bed, following him down, supporting his weight until his back met the mattress. Elliot sank into the familiar softness, his body completely yielding. Caleb pulled the comforter over him, tucking it loosely around his shoulders.

For a moment, Caleb stayed there, perched on the edge of the bed, looking down at his brother’s face, peaceful in the dim light. He brushed a final strand of hair from Elliot’s forehead, then stood.

He moved quietly through the room, stripping off his gym shorts and pulling on a pair of sweatpants before climbing into his own bed on the opposite side of the room.The springs creaked softly with his weight.Silence settled, deep and complete. In the lower bunk, Elliot drifted on the edge of sleep, his body still humming with the memory of held warmth, his senses saturated with the scent of alpha.Of family.Of possession. The hollow ache was quiet now, a dormant ember banked in his core.

And so the brothers went to sleep.

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