Knot While on Call

by Nightowl_22

Summary:

"Yeah, Jackson, I get it—Lacrosse practice has been brutal this week,"

Derek said into the phone—voice steady, even as Stiles teases his slicked-up hole in a deep mating press, legs hooked over broad shoulders, massive hairy ass spread wide and quivering for that first brutal thrust.

Or the one where Derek’s on the phone with his boyfriend Jackson, complaining about lacrosse—except Stiles has him folded in half, legs over shoulders, getting railed senseless in a deep mating press

"Yeah, Jackson, I get it—Lacrosse practice has been brutal this week,"

 

Derek said into the phone, his deep voice steady despite the beads of sweat already forming on his brow. He was flat on his back in the center of his loft's king-sized bed, the sheets rumpled beneath him, his thick, powerful legs hooked over Stiles' broad shoulders. Stiles, his sneaky werewolf bastard of a beta, had positioned him like this from the start—Derek's knees nearly pressed to his chest in a deep mating press, exposing his fat, huge, hairy ass completely. Those massive booty cheeks were spread wide apart, the dark coarse hairs matted with slick lube, quivering with raw anticipation as Stiles teased the swollen, veiny head of his massive, throbbing cock against Derek's slicked-up, puckered hole, pushing in just the tip to stretch the tight ring before pulling back slowly, drawing out the exquisite torture, making Derek's hole twitch and clench hungrily for more.

 

Jackson's voice came through the speaker, sharp and cocky as ever. "Derek? You sound kinda off. Are you hitting the gym without me, or what?"

 

Derek's breath caught sharply as Stiles finally sank in, inch by thick, throbbing inch, his enormous cock splitting Derek open, stretching his tight, hairy asshole wide with that pistoning massive shaft. The position made every brutal thrust feel impossibly deep, Derek's huge ass cheeks bouncing and jiggling wildly with the force of it, the hairy globes slapping loudly against Stiles' hips, the impact sending ripples through the plush, sweaty flesh. He bit down hard on his lip, muffling a low, rumbling growl that threatened to escape as his inner walls gripped Stiles' dick like a vice, milking every veiny ridge.

 

"N-no, just... dealing with some stuff," he grunted, his voice rough and strained. Stiles grinned down at him, amber eyes glowing faintly with his werewolf nature, hands gripping Derek's thick thighs to keep him folded in half as he switched to a slower, deliberate rhythm—pulling out almost all the way, leaving Derek's hole gaping and empty before slamming back in balls-deep, making Derek's massive booty bounce hypnotically, the cheeks clapping together obscenely with each powerful plunge.

 

"Fuck," Derek cursed under his breath, turning it into a throat-clearing cough at the last second. His body arched despite the pinned position, the werewolf's enhanced strength no match for the overwhelming pleasure of being filled so completely, his prostate getting hammered relentlessly, sending jolts of electric ecstasy through his core. Stiles leaned in closer, his breath hot against Derek's neck as he whispered teasingly, his cock grinding deeper into the hot, slick channel.

 

"Shh, Sourwolf. Can't have your jock boyfriend hearing how you're getting mated like a bitch in heat, can we?" Stiles bantered, his voice low and playful, one hand sliding down to squeeze one of Derek's massive cheeks, feeling the hairy, sweat-slicked flesh ripple under his palm as he kneaded it roughly. He gave it a firm, playful smack, the sharp crack echoing in the loft, making Derek jolt and clench tighter around him, his asshole fluttering and squeezing Stiles' massive cock in a desperate rhythm.

 

Derek glared up at Stiles, his own eyes flashing red, but his hips rolled up instinctively, chasing more of that delicious, burning stretch, his hole greedily swallowing every inch.

 

"Stiles, shut your mouth," he hissed quietly, away from the phone. Jackson was still yapping about his teammates, his tone laced with that entitled arrogance, but Derek's focus was shattering with every bounce of his ass against Stiles' relentless thrusts, the wet, squelching sounds of their fucking growing louder.

 

"What? Did you say something?" Jackson asked, sounding vaguely annoyed. "Or is someone there messing with you?"

 

Stiles' grin widened, his werewolf stamina kicking in as he picked up speed, pistoning into Derek with short, sharp jabs that made those huge, hairy booty cheeks quake and clap obscenely, the hairs sticking together with sweat and lube as the cheeks jiggled uncontrollably. Derek's mind blurred, pleasure spiking hot in his veins, his cock leaking pre-cum steadily onto his abs.

 

"Uh, yeah—Stiles is... around," Derek admitted through clenched teeth, pressing the phone harder to his ear to muffle any slips. A deep moan built in his chest as Stiles angled just right, hitting his prostate dead-on with every brutal thrust, making Derek's hole spasm and his balls tighten.

 

"Helping with pack... research. Yeah."

 

"Stiles? That sarcastic prick?" Jackson scoffed, his hatred for Stiles dripping from every word. "Tell him to piss off. I don't want him anywhere near you—or our conversations."

 

Stiles overheard and chuckled softly, unfazed.

 

"Aw, Jackie still has a hate-boner for me? Adorable," he murmured to Derek, pulling back to deliver another playful smack to Derek's bouncing ass cheek. The impact sent ripples through the plush, hairy flesh, a red mark blooming amid the dark hair as Derek's hole fluttered wildly around Stiles' cock, drawing a pleased growl from the younger werewolf. "Your ass is insane, Derek— so fat and hairy, bouncing like that on my dick. You're loving this, aren't you? All folded up for your beta."

 

Derek's breath hitched in ragged pants, his free hand fisting the sheets as he fought to stay composed. "Jackson, just... ignore him," he managed, but inside he was melting, the spanking adding a sharp, stinging edge to the pleasure, his asshole burning deliciously from the stretch and slaps. Stiles' playful kink always broke through his brooding facade, turning him into a writhing mess, his massive cheeks continuing to bounce with each deep, pounding thrust.

 

"Come on, big bad alpha—admit you're my slut for this huge cock," Stiles teased, his voice dropping husky as he slowed to deep, grinding rolls, making Derek's booty cheeks jiggle with each circular motion, his cock stirring up Derek's insides, churning the lube into a frothy mess. "Look at you, legs over my shoulders, ass up and begging. Bet Jackson couldn't make you beg for his small dick like this."

 

"Fuck off, Stiles," Derek growled softly, no real bite to it—just needy heat. His massive cheeks kept bouncing with every piston thrust, the position letting Stiles hit depths that made stars burst behind his eyes, his prostate throbbing from the constant abuse, pre-cum pooling on his stomach. Jackson complained about a rival player, but Derek's replies were clipped "uh-huh"s, his mind too fogged.

 

Then, Stiles pulled out abruptly, leaving Derek clenching around emptiness, his stretched, gaping hole winking and dripping lube, a frustrated whine escaping before he could stop it. "Stiles—"

 

"Hold that thought, Sourwolf," Stiles smirked, shoving Derek's legs even higher to expose him fully, his massive, hairy ass cheeks spread obscenely wide, the puckered hole twitching in the cool air. He dove down, burying his face between those massive, hairy cheeks, his tongue lapping greedily at Derek's stretched rim. The musky, salty taste hit him like a drug, and Stiles groaned into the flesh, sucking and probing with filthy enthusiasm, his tongue delving deep into the slick, loosened channel. His hands kneaded the bouncing globes, spreading them wider for deeper access, tongue fucking in and out with wet, sloppy sounds that filled the room, lapping up the mix of lube and Derek's natural musk.

 

Derek's eyes widened, a loud moan ripping from him that he barely caught by slamming his hand over his mouth. "Shit—Jackson, wait, I... thought I heard something," he blurted, voice muffled and trembling. Stiles' tongue delved deeper, swirling around the sensitive rim before pushing inside, tasting the remnants of lube and pre-cum, his nose buried in the hairy crack. He added fingers, two at first, scissoring them wide to stretch the hole further while his mouth worked overtime—nipping at the hairy skin, sucking hard on the pucker, humming vibrations that shot straight up Derek's spine, making his cock twitch and leak more.

 

"Oh fuck, Stiles—that's... ngh," Derek whispered harshly, his free hand tangling in Stiles' hair, yanking him closer despite the danger. The rimming went on longer this time, Stiles savoring every inch, his werewolf senses heightening the experience. He lapped broad stripes from Derek's heavy, hairy balls to his hole, then focused on the rim, teasing the edges with light flicks before plunging back in hotter than before.

 

"You taste so goddamn good, Derek—your hairy ass is my feast," Stiles murmured between licks, adding a third finger to stretch him further, crooking them against that sweet spot while his tongue rimmed the outside, flicking and sucking the sensitive folds. Derek writhed, hips bucking up into Stiles' face, his massive cheeks quivering around the invading mouth, the wet slurps echoing as Stiles devoured him.

 

"More—fuck, don't stop, you tease," Derek begged under his breath, the banter turning desperate. "Eat me out like you mean it, Stiles."

 

"Like this?" Stiles shot back playfully, sealing his lips around the hole and sucking hard, his tongue thrusting in rhythm with his fingers, probing deep into the slick heat. The slurping was obscene, wet and relentless, extending the torment as Derek trembled on the edge, his cock leaking profusely onto his abs, balls drawing up tight. Minutes stretched, Stiles alternating between deep tongue-fucks and gentle nibbles, even blowing cool air over the slicked skin to make Derek shiver before diving back in hotter than before, his fingers pistoning in and out, curling to hit Derek's prostate repeatedly.

 

Jackson sounded puzzled and irritated. "Derek? You're acting weird. Zoning out again? And why's Stiles still hanging around like a bad smell?" He paused, his voice turning more accusatory. "You know, you've been spending way too much time with that loser lately. Every time I call, he's there, or you're off doing 'pack stuff' with him. It's bullshit, Derek."

 

Even though Jackson was Derek's boyfriend, Derek always excused himself by telling Jackson that, as a wolf, spending time with their betas was primordial—essential to maintaining pack bonds and hierarchy. And with Stiles being the newest one, turned just a few months ago during a chaotic battle against hunters, Derek had always had to spend more time with him, training him in control, scenting him to integrate him fully, and ensuring his instincts aligned with the pack's. It was more than that, though—Stiles' mischievous energy and their unresolved sexual tension had drawn Derek in from the start, their banter evolving into this secret, heated affair that Jackson remained oblivious to.

 

Before Derek could scramble for words, Stiles popped up with a glistening chin and a wicked grin, snatching the phone effortlessly.

 

"Hey, Jackson! What's up, man?" he said casually, as if his face wasn't buried in Derek's ass seconds ago. He lined up his massive cock and thrust back in smoothly, resuming the mating press with Derek's legs hooked high, his booty bouncing wildly once more, the hairy cheeks slapping against Stiles' hips with each deep, forceful plunge, his hole gripping tightly around the invading shaft.

 

Jackson's reply was pure venom. "Stilinski? The fuck? Give Derek back the phone—now. I don't talk to losers like you."

 

Stiles laughed breezily, thrusting lazily while pinning Derek down, his cock grinding slowly and deeply, stirring Derek's insides. "Ouch, still hating on me? We're just... bonding over pack stuff. Derek's a little occupied." He smacked Derek's ass cheek hard—five stinging slaps in quick succession, making the hairy flesh bounce and redden, the impacts sending shockwaves through Derek's body, his hole clenching spasmodically around Stiles' dick.

 

Derek mouthed 'Asshole!' but Stiles winked, teasing Derek's nipple with his free hand while chatting, pinching and twisting the sensitive bud. "So, that lacrosse drama—sounds rough. Derek was filling me in." He emphasized 'filling' with a deep thrust, making Derek's eyes roll back, his prostate getting nailed perfectly.

 

Jackson grumbled, hating the interaction but clueless that his boyfriend was getting railed senseless. The call dragged, Stiles switching between pounds and spanks, even dipping down briefly for more rimming licks while holding the phone steady, his tongue flicking quickly over Derek's twitching hole before thrusting back in. Finally, he tossed it back. "Your turn, big guy."

 

Derek grabbed it, voice wrecked. "Jackson—I gotta go. Stiles is a pain in the ass."

 

Stiles snorted, smacking him again. "Literally."

 

After a hasty hang-up—Jackson still bitching about Stiles—Derek let loose, moaning as Stiles fucked him harder, his massive cheeks bouncing furiously with each savage thrust, the wet smacks filling the room.

 

"You prick—c'mon knot me!"

 

Stiles' eyes glowed brighter, and as if it was waiting for his alpha to say it, his knot started to swell at the base, stretching Derek's rim even wider.

 

"Oh, yeah—gonna knot this fat ass, Derek. Fill you up with my kids." He pistoned faster, Derek's massive cheeks bouncing furiously, the hairy globes quaking as the knot swelled, until it caught, locking them together in a tight, pulsing seal. Derek roared, cumming hard across his chest, his hole milking Stiles' release deep inside, hot spurts flooding his insides. Tied and pulsing, they panted, Stiles nuzzling Derek's neck.

 

"Mine now, Sourwolf."

 

Derek chuckled breathlessly. "Always was, you idiot." The knot held them close, forgetting about Jackson for the moment.