Knotted

Erotic short. It’s the full moon, and they’re trying something new.

Rated E, cis M/M, transformed werewolf sex! Knotting, big size difference, slight belly bulge, anal, come inflation.

“Oh, God, oh, God, oh, God,” Stefan whimpers against the pillows he’s stacked up against, and Vido’s breaths are hot on the back of his neck, big fucking paws resting on the rug either side of his head. Stefan doesn’t even know how it’s possible for him to get this much bigger than normal, to fucking, what, triple, to quadruple, in size and muscle mass, but it explains why Vido’s always sore for days after the full moon. “How much — how much can you understand me right now?”

Vido’s tongue swipes unspeakably hot up the back of Stefan’s neck, tasting the sweat there, and his cock slides further out of its sheath, landing heavily on top of Stefan’s ass cheeks, sliding between them.

It’s so fucking wet, so slippery, and Stefan imagines it, blindingly red with a glossy shine to the slick skin, so fucking different to Vido’s cock usually, and somehow even fucking bigger.

“That’s not an answer,” Stefan chokes out as Vido bluntly rubs up against him, tries to shove inside him but is clumsy about it, and he growls low in his throat from frustration — it’s a chesty sound, comes with a vibrato edge that goes right through Stefan’s ribcage and makes him shudder. “Vido, Vido, Vido, I don’t know if I can — “

Vido manages to prod the tapered tip of his cock into the right place, and Stefan’s already prepped and open and slick with lube, had worried that he’d fucking over-prepared before he’d laid eyes on Vido’s cock and seen how fucking massive it is when he’s transformed like this.

“Wait, wait — “

The tapered dick does a lot for easing the way: Vido slams his hips forward in one sudden, sharp movement, and Stefan just fucking stretches, has no goddamn choice to do anything else, and he wails into the pillows as Vido gives an answering howl, snapping his hips against Stefan’s in greedy, hungry movements. It’s unspeakable, just how wet and slippery his cock is, how strange the shape of it feels, going from the tapered tip to the thicker base —

Thicker.

Thicker than that, even.

Thicker still.

“Vido,” whimpers Stefan, breathless and overwhelmed and overstimulated by the shadow of Vido’s big man-wolf body on top of him, the shove of his hips and the brush of thick hair (Vido had grumpily informed him that werewolves were hypoallergenic because they had hair instead of fur, and had sulked for hours when Stefan had cracked up laughing) against his arse, his lower back.

The knot is nudging up against his arse, and he yelps when Vido shoves forward harder and pops it past his rim and fuck, but it’s big, feels thicker and harder than Vido’s cock, and it’s still inflating, still getting even fucking bigger, and Stefan is whining constantly, can’t stop the sounds from coming out of him.

Vido’s come is hot and thick where it pumps into him, and his knot is pressing hard against Stefan’s prostate, tugging at his ring as he shifts back, and it’s so big, too big, he can feel it, his cock, his knot, his come, all of him filling Stefan’s guts.

Vido grazes his teeth over the back of Stefan’s neck, stilling his hips, his body sinking over Stefan’s, and Stefan closes his eyes, feeling him keep just fucking —

Pumping.

His belly has a slight swell to it when he glances down, and dizzily, he presses back into the swipe of Vido’s tongue for more.