Deep In Your Mouth- Sterek, NC-17
Based off of this prompt.
It's driving Derek to the brink of insanity.
He is literally losing it. He's dreaming about Stiles' mouth, the way his lips close around his thumb when he sucks pizza grease off it and the way his tongue licks milkshake off his soft upper lip. Derek is going to end up killing someone out of sexual frustration, he pushed Jackson off a cliff yesterday. It was a small cliff, more of a gentle incline, but the point is that Derek didn't know that.
Anyways.
Today they're all at the Hale house, the whole pack. Jackson and Scott are play wrestling in the dining room and Stiles and Derek are at the table calling up contractors and trying to get someone to come look at it to so they can get an estimate on the cost of fixing it up. Stiles has a fucking pen in his mouth, nib side in, and Derek can see the glint of the metal tip against the kid's tongue. He yawns and the pen slips to stretch out the corner of his mouth and Derek can see an inky splotch where the pen leaked a little, he reaches out without thinking and rubs his fingertip over the spot. Stiles' teeth close automatically and catch on Derek's digit, he curls it downward and Stiles' jaw opens just enough that Derek can see the shine of his throat working nervously.
"Scared, little rabbit?" He asks and Stiles jerks his head back, then purses his lips and flushes a soft red all over his pretty, white skin.
"No." Stiles blurts out and Derek leans forward on his elbows and grins with just enough teeth to be frightening.
"I don't believe you." Derek says softly and then he hears Scott and Jackson climb to their feet.
"Why is this exactly like when my parents flirt in front of me?" Jackson whines and Scott looks supremely uncomfortable.
"Shut up." Stiles murmurs and ruffles the papers in front of him around.
"Go find Lydia." Derek orders and Jackson is stripping off his clothes and shifting within seconds, Scott lingers just long enough that Derek gets irritated. "Scott, go."
Scott looks conflicted, but ultimately his wolf submits and he's yanking his short over his head and his boxers down over his feet. He scents the air, then his face morphs from worried to grossed out,he bolts out the door after Jackson.
"W-why'd he take off so fast?" Stiles asks and the heavy air the boys left behind is broken. Derek slides his chair back from the table and Stiles shrinks in his seat.
"He smelled your lust." Derek says and then internally regrets it. There's no un-lame way to say desire. Stiles clearly doesn't care about the wording because his want is doused in fear so fast it makes Derek light-headed.
"Calm down, Stilinski." Derek purrs and pushes his board shorts down off his hips, they puddle around his feet and he steps out of them and up to Stiles. "Why do you think I sent the pups off?"
"So no one would be around to see you kill me?" Stiles squeaks and he's chewing his fucking nails and his lips are curled up and away and Derek wants to bite them until the boy cries.
"I sent the pups off so I can have some fun with Mommy." Derek steps closer and rubs his finger tips over the rough, dry lips.
"I don't really know-"
"Hush." Derek says calmingly and then he's close enough to grab the back of Stiles' head in one hand and rub the head of his cock over the boy's lips. "Open up, mama." He growls and Stiles' mouth falls open enough that Derek can rub the tip of his prick against Stiles’ tongue.
Stiles makes a soft noise and slowly moves forward, he’s got his folded hands pressed down against his own cock and he’s just letting Derek guide him, open and warm and Derek could come off the power alone. He watches Stiles long, girly eyelashes settle and he can feel his boy’s clumsy tongue circling and moving, trusting Derek so much.
“I want this.” Derek says without thinking and Stiles looks up at him with those eyes. “I want you around.” He presses his fingertips on either hand into the hollow of Stiles jaw so the boy will open his mouth and starts thrusting, slowly and Stiles closes his eyes again.
He moves one hand away and grabs the base of his cock and starts jacking it. Stiles opens up as wide as he can and Derek pushes in until he chokes a little, but then he’s back pushing himself, working Derek’s cock in with his tongue and panting out these shuddery little breathes around Derek.
“I’m going to cum on your face.” Derek grunts and Stiles squeezes his eyes shut. Derek pulls out of his mouth and moves his fist faster, he grabs on to the back of Stiles’ head with the other. He stripes Stiles mouth with his jizz and and rubs it in wherever it landed with shaky fingers, Stiles grimaces and pulls back but Derek growls once and he freezes.
“Marking you.” Derek slurs and leans down to lap at the tacky skin around Stiles’ mouth, “They’ll know they can’t touch you.”
“You should touch my dick before it explodes, please.” Stiles says and Derek licks into his mouth and reaches down his pants.
***
“Oh, sick.” Jackson bitches when he steps through the door and sniffs, Scott makes a sad, whining noise and they elbow each other trying to get out the door first.
“What? What happened?” Lydia calls from the front door and then they hear a quiet, “Oh.”
“Move, Lydia!” Jackson yelps and then something breaks and the floorboards creak ominously.
Lydia peeks her head in the door and Derek tracks her face and a wicked grin splits her face. “Looks like Mama and Daddy had fun.” She laughs and Derek flings the phone book at her head.
“Got get our pups, she-demon.” Stiles says out from where his face is smashed against the tables. She cackles but then the front door opens and closes again.
“You called them our pups.” Derek says proudly and Stiles peeks at him.
“Are you seriously happy about that? You’re such a dork.”
“Shut up or I'll chew your face off."