Chapter 3: Unexpected Guest
The bedroom door creaked open with an abruptness that shattered the thick, sated silence.
Stiles stood frozen in the doorway, a half-eaten bag of chips dangling from one hand. His eyes, wide and startled, darted from Scott, still seated on the edge of the bed, sweat-sheened and breathing hard, down to Derek kneeling naked on the carpet between Scott’s spread thighs. Derek’s lips were swollen, glistening with saliva and traces of Scott's spend, his chin slick with it. His intense green eyes, still clouded with heat-haze but now sharpened by sudden shock, locked onto Stiles.
"Whoa! Shit! Sorry! Wrong room!" Stiles yelped, stumbling backwards, his face flushing crimson. The bag of chips crinkled loudly in his grip. "Door was open a crack, I just… Pizza delivery guy knocked and I… holy fuck." His gaze snagged, seemingly against his will, on Scott’s softening but still impressive cock, glistening wetly, and then on Derek’s wrecked mouth and the evidence dripping down his throat.
Scott didn’t flinch. He didn’t cover himself. A slow, predatory smirk spread across his face, his warm brown eyes glinting with an Alpha’s absolute confidence. He lazily trailed his fingers through Derek’s dark, sweat-damp hair, the possessive gesture stark. "Stiles," he said, his voice a low rumble that vibrated through Derek’s skull where he knelt. "Perfect timing."
Derek’s senses, already overloaded with Scott’s scent and the lingering taste of his release, suddenly filled with something new. Stiles. The sharp, clean tang of soap and cheap deodorant cut through the musk, underlaid by the unmistakable spike of adrenaline and… curiosity? Derek’s Omega instincts, far from recoiling in embarrassment, flared violently. Another presence. Potential. Alpha scent nearby, different. Safe? Pack? The heat surged, a fresh wave cresting over the momentary shock, making his ass clench desperately around emptiness. More slick seeped out, the scent intensifying the room’s pheromonal soup. His neglected cock, which had softened slightly after Scott’s throat-fucking, gave a painful throb.
Stiles sputtered, gesturing vaguely with the chip bag. "Timing? Scott, man, I just walked in on you… and Derek…" He swallowed hard, his Adam's apple bobbing. "He was… you were…" He couldn't seem to articulate it. His eyes flickered over Derek’s lean, muscular form, the sheen of sweat on his skin, the way he still knelt so submissively at Scott’s feet, then back to Scott’s unapologetic state of undress.
"Seeing as you’re here," Scott continued smoothly, his smirk deepening. His thumb brushed Derek’s lower lip, smearing a bead of spit. "And Derek’s heat… it’s not done. Far from it." He met Stiles’ eyes directly, the command in his gaze unmistakable, layered over the familiar warmth of friendship. "Join us."
Derek’s breath hitched. Join us. The words echoed in his heat-fogged brain. Two. His gaze snapped to Stiles, taking in the lanky frame, the messy brown hair, the expressive eyes now wide with disbelief and a dawning, undeniable arousal. The scent of it, Stiles’ arousal, subtle at first, bloomed stronger now, mixing with Scott’s overwhelming dominance. It was different, less primal, more humanly nervous, but potent nonetheless. Derek’s Omega instincts surged higher, screaming submission, service, please. The burning emptiness in his ass intensified into a frantic ache. He needed to be filled. By Scott. By… anyone Scott allowed. His Alpha offered him this. He wanted it. Needed it.
Stiles stared, frozen for another heartbeat. "Join…? Scott, are you serious? Derek… dude, you okay with this?" His voice was rough with incredulity and something else – a shaky excitement he couldn’t quite mask.
Derek didn’t hesitate. Fueled by the heat’s blinding drive and a desperate need to please, to obey the permission granted by his Alpha, he turned fully towards Stiles. He shuffled forward on his knees across the carpet until he was directly before him. He looked up, his green eyes wide, pleading, needy, pupils blown black with lust. His voice was a wrecked whisper, raw from Scott’s cock, thick with submission. "Please, Stiles. Need… need it. Need you." His hand trembled as he reached for the waistband of Stiles’ jeans, fingers fumbling with the button. "Alpha." The title, usually reserved for Scott, slipped out instinctively, imbued with the heat’s desperate logic. Alpha offers. Alpha shares. Serve.
"Fuck," Stiles breathed, the chip bag falling forgotten from his hand, spilling crumbs on the floor. He saw the raw, unvarnished need in Derek’s eyes, felt the trembling fingers at his fly. The scent of Derek’s slick, the musk of sex, Scott’s unwavering, expectant gaze… it overwhelmed his hesitation. He let out a shaky laugh, a mix of nerves and burgeoning desire. "Okay. Okay, holy shit. Yeah. Just… fuck." He clumsily helped Derek push his jeans and boxers down over his hips, his own cock springing free. It was hard, thick, uncircumcised like Scott’s but perhaps slightly less imposing – still more than enough. The scent of Stiles’ arousal intensified, mingling with the others.
Derek moaned at the sight, a low, hungry sound. Without preamble, driven by instinct, he lunged forward, wrapping his lips around Stiles’ cock. He sucked greedily, tongue swirling over the head, lapping at the pre-cum already beading there. It tasted different from Scott’s – slightly muskier, uniquely Stiles. Derek moaned again, the vibration making Stiles gasp and buck his hips involuntarily.
"Jesus Christ, Derek!" Stiles choked out, his hands instinctively flying to Derek’s head, not gripping hard like Scott’s, but tangling in his dark hair. "Fuck, that’s… yeah…"
Scott watched, a low growl of approval rumbling in his chest. He pushed himself off the bed, his own cock rapidly hardening again at the sight. He moved behind Derek, his large, warm hands settling possessively on Derek’s hips. Derek whimpered around Stiles’ cock, the dual sensations overwhelming – Stiles’ heat filling his mouth, Scott’s commanding presence at his back. Scott leaned down, his breath hot on Derek’s neck. "Good, Omega. Show him how good your mouth is."
Derek obeyed, hollowing his cheeks, sucking harder, bobbing his head with frantic eagerness. Stiles groaned, his head falling back. "Oh god… Scott, he’s… fuuuuck!"
Scott’s hands slid around Derek’s hips, fingers trailing through the copious slick dripping from Derek’s hole, making the Omega shudder violently. Scott gathered the wetness, spreading it, his thick fingers teasing the hyper-sensitive rim. Derek cried out around Stiles’ cock, the vibration drawing a ragged curse from Stiles.
"His ass is dripping, Stiles," Scott murmured, his voice thick with lust. He pressed two fingers easily into Derek’s slick channel, encountering no resistance, only wet, welcoming heat. "Made for this. Begging to be fucked." He pumped his fingers slowly, stretching Derek unnecessarily – the Omega’s body yielded instantly, clamping down greedily.
Derek was lost. The smell of two aroused males, the taste of Stiles on his tongue, the feel of Scott’s thick fingers fucking his hole… it flooded his system, drowning rational thought in a tidal wave of heat-driven need. He sucked Stiles harder, faster, taking him deeper, letting his throat relax on the downstroke, gagging slightly. He needed Stiles to come. Needed Scott inside him. Needed to be filled in both holes. The emptiness was unbearable. He pushed his hips back against Scott’s fingers, impaling himself deeper, a desperate whine escaping him.
"Look at him," Scott growled, his own cock rock-hard now, nudging against Derek’s slick backside. "Look at that greedy fucking hole." He withdrew his fingers, eliciting a sharp cry of protest from Derek. Derek felt Scott’s thick, blunt head press against his entrance, slick with his own wetness.
Stiles was panting, thrusting shallowly into Derek’s mouth, his fingers tightening in Derek’s hair. "Gonna… Derek… holy shit, I’m gonna blow…"
Scott thrust forward. Hard. His thick cock speared into Derek’s unresisting passage with one smooth, powerful stroke, burying itself to the hilt. Derek screamed around Stiles’ cock, the sensation of being filled so completely, so suddenly, igniting every nerve ending. His ass stretched obscenely around Scott’s girth, but the slick, elastic heat of his Omega body welcomed it, clenched around it, milking it instantly.
The violent penetration, the feeling of Scott’s cock stretching him wide and deep, was the final trigger. Stiles shouted, his hips jerking, his cock pulsing hot jets of salty cum deep into Derek’s throat. Derek swallowed convulsively, gagging slightly but taking it all, the taste of Stiles joining Scott’s earlier release.
"Fuck yes, take it," Stiles groaned, trembling as he spent himself down Derek’s throat.
Scott didn’t pause. He pulled his hips back almost immediately, dragging his thick shaft out until just the head remained seated, then slammed back in with brutal force. Derek choked on Stiles’ cum, tears springing to his eyes again, but the pleasure was overwhelming. Scott’s cock filled him perfectly, stretching his inner walls, hitting that deep spot inside him that made stars explode behind his eyelids. His ass was a slick, tight vice around Scott, never sore, only demanding more, more, more.
"That’s it, Omega," Scott snarled, setting a punishing pace, his hips pistoning, balls slapping against Derek’s ass cheeks with wet smacks. He gripped Derek’s hips hard enough to bruise, holding him steady for the deep, savage thrusts. "Take your Alpha’s cock. Fuck yourself back on it."
Derek pulled off Stiles’ softening cock with a wet pop, gasping for air, spit and cum dripping from his chin. He braced his hands on Stiles’ trembling thighs, still kneeling, and pushed back desperately against Scott’s relentless pounding. Each powerful thrust drove him forward against Stiles’ legs, the friction against his own neglected cock sending sparks through him. "Scott!" he cried out, his voice wrecked. "Yes! Fuck! Harder! Please, Alpha!"
Stiles leaned back against the doorframe for support, breathing heavily, watching with stunned, lust-blown eyes as Scott ruthlessly fucked Derek’s ass. "Jesus, McCall," he breathed, a shaky laugh escaping him. He reached down, his fingers hesitantly tracing the flushed skin of Derek’s cheek, smearing the mess there. "You're… uh… kinda intense, Hale."
Scott grunted, his rhythm never faltering. The bedframe groaned in protest against the wall with each powerful drive. He leaned forward, his chest pressing against Derek’s sweaty back, one hand sliding around to roughly palm Derek’s bouncing cock. "He’s perfect," Scott growled, his voice thick. "Fucking perfect Omega. Look at him take it. Look how wet he is for us." He squeezed Derek’s cock, tugging roughly in time with his thrusts.
The dual stimulation – Scott’s cock hammering his prostate, Scott’s hand on his own aching dick – pushed Derek towards the edge faster than he’d ever been. He was a writhing mess, pinned between Scott’s dominating body and Stiles’ legs, keening with each brutal penetration. His vision blurred. The world narrowed to the stretch and burn and mind-shattering fullness of Scott’s cock, the rough friction on his own, the scent of sweat, sex, and Alpha surrounding him. Stiles’ scent was woven into it now, adding another layer of intoxicating belonging. His hole fluttered wildly around Scott’s shaft, slick gushing with each inward thrust.
"Gonna come!" Derek sobbed, the words barely coherent. "Scott! Alpha! Please!"
"Come," Scott commanded, his thrusts becoming shorter, harder, deeper, grinding against that spot inside Derek relentlessly. "Come all over his legs, Omega. Show him how good we make you feel."
The command shattered Derek’s last shred of control. He threw his head back against Scott’s shoulder, a raw, guttural cry tearing from his throat. His cock pulsed violently in Scott’s grip, thick ropes of cum splattering across Stiles’ thighs and the carpet below. His ass clenched and spasmed around Scott’s invading cock like a velvet fist, milking it with frantic pulses as wave after wave of ecstasy tore through him.
Scott roared, burying himself impossibly deep one final time as Derek’s convulsing channel triggered his own climax. He slammed home, his body locking, his cock throbbing as he pumped thick streams of hot cum deep inside Derek’s clenching heat. He held himself there, grinding, as he emptied himself, filling Derek to overflowing.
They collapsed together in a sweating, panting heap. Derek slumped forward, catching himself on Stiles’ legs, trembling violently through the aftershocks. Scott leaned heavily over him, still buried deep, his breathing ragged against Derek’s neck. Derek could feel the hot pulse of Scott’s release inside him, the slick mess between his legs, the drying streaks of Stiles’ spend on his face. The heat still simmered beneath the exhaustion, a relentless throb, but the immediate, desperate edge had been blunted. For now.
Stiles looked down at the trembling Omega leaning against him, then at Scott over Derek’s shoulder. He wiped a shaking hand over his face, a dazed, slightly hysterical grin spreading across his lips. "Well," he rasped, his voice rough. "That was… educational. Also, better than Netflix."
Scott chuckled, a low, satisfied rumble. He slowly, carefully, pulled his softening cock from Derek’s well-used hole with a wet, sucking sound. Derek whimpered at the loss, the emptiness instantly painful again, but he was too spent to do more than slump against Stiles’ legs, his eyes fluttering shut. Slick and cum leaked freely down his thighs.
"Told you," Scott said, breathing heavily as he straightened up. He ran a hand possessively through Derek’s sweat-soaked hair. "He needs it. Gets like this in the heat." He looked at Stiles, his gaze assessing but warm. "You good?"
Stiles looked down at Derek’s wrecked form leaning on him, then at the mess on his own thighs. He let out another shaky breath, the grin softening into something more genuine. "Yeah, Scott. Weirdly? Yeah. I’m good." He tentatively rested a hand on Derek’s trembling shoulder. "You alive down there, Hale?"
Derek managed a weak nod against Stiles’ leg, a small, exhausted sound escaping him. The heat pulsed low in his belly. Insatiable. But surrounded by their warmth, their scent – the dominant Alpha he belonged to, and the unexpected, grounding presence of Stiles – the desperate edge softened into a heavy, sated lethargy. For now. He knew it wouldn’t last. It never did. His body craved, always craved. But nestled between them, leaking their combined essence, a fragile sense of belonging momentarily eclipsed the relentless need. He nuzzled Stiles’ thigh, inhaling the new, comforting scent mixed with his own submission. The next wave would come. But for this fractured moment, wrapped in the aftermath and the scent of pack, he could breathe.