A/N: So I thought I'd try and have a stab at writing this a little less formally rather than super serious adult author style if you know what I mean (you probably don't) ALSO; This chapter is a little more inappropriate than the ones so far so... Yeah. I'm not gonna say don't read it if you're young, cuz you're gonna do what you want. Damn you rebellious kids.
DEAN
It was safe to say that the moment Dean heard the purr of the Camaro outside the house, defensive dad mode had been activated. He stood up from the couch and straightened his sweater, moving to answer the door. He was almost knocked down by Stiles who shot past him to open it before him.
"Hi Derek!" His son greeted the man at the door who looked at his flushed face in surprise. Dean rolled his eyes.
"Come in." He smiled falsely, Derek made no attempt to smile back.
"Don't mind if I do." He murmured.
Castiel left the kitchen where he'd been preparing popcorn to say hello to Derek, he of course was delighted by his presence.
"I'm very glad you could make it, Derek. Please sit down." He gestured to the couch. Derek slumped down on the left end of the piece of furniture.
Dean tried to sit next to him so that Stiles didn't have the option but yet again, he beat his father to the punch, plopping down happily next to Derek. Dean stiffened in irritation, but settled for sitting on Stiles' right. He snatched the remote from the arm of the couch and switched on the large TV that was situated opposite them.
When Castiel returned, he was balancing two large bowls piled dangerously high with popcorn, it smelt delicious. He handed one to Stiles and Derek for them to share and sat in the remaining space next to Dean, snuggling up to him. His mood settled a little once he had his husband in his arms.
It would have been an uncomfortably cosy affair if not for the more than ample size of the soft red couch. Dean began scrolling through the on demand movie selection.
"So, what'll it be tonight? And don't say Open Season Stiles because we've watched that movie at least seven times." His son flushed pink with embarrassment and Cas elbowed him sharply.
"Any ideas Cas?" He asked, watching his husband's face contort as he considered, within seconds his expression brightened.
"What about that very interesting movie we watched years ago about the pizza delivery man and the lady, where he-"
"NO! Not that one!" Dean laughed nervously. He'd never really got round to explaining the concept of that particular 'movie' to Castiel.
Then again, once he and Cas finally got together, Dean didn't need those 'movies' anymore.
After a good five minutes of scrolling alphabetically, something caught Dean's eye. 'Twilight'. Wasn't that the movie with the werewolves? He grinned devilishly, this was the one. He clicked on it and Stiles groaned loudly.
"Dad, please no."
He quickly purchased it.
"Oops already bought it. Guess we gotta watch it now." He spotted Derek shifting uncomfortably in the corner of his eye, he felt it was going to be an entertaining experience.
After approximately 20 minutes of gaping on the clueless heroine's part and angsty stares from the main vampire, Dean sorely regretted picking the movie. There was hardly any mention of the werewolves and it was an incredibly boring film. Of course, despite his initial protests, Stiles was enraptured and was clearly enjoying the movie. He was hardly able to tear his eyes from the screen to eat his popcorn.
Eventually, the film drew to a close, and Dean couldn't shake a heavy feeling of shame for wasting over an hour of his adult life watching pale teenagers prance around sparkling and professing their love for each other. The one werewolf that made an appearance Dean recognised, as Stiles had a crush on the actor years ago in another movie where he played a shark or something.
He could also confirm from experience, vampires did not sparkle.
He stood abruptly and stretched, Derek retracted an arm he'd had around Stiles that Dean hadn't even noticed was there. They stared each other down for a few seconds, before Stiles coughed awkwardly.
"Hey... Can Derek stay for dinner?" He asked hopefully.
"No."
Dean felt terrible the minute he said it, his son's face dropped and the disappointment in his eyes was unbearable. He sighed dramatically.
"Fine. You better like pizza, Derek." Stiles grinned widely at Dean.
"I love pizza." Derek smiled oh so sweetly. Dean would have loved nothing more than to punch him square in his cocky face.
But of course, before he could even move, Cas was dragging him to the kitchen.
STILES
After a slightly awkward dinner of pizza during which Dean glared murderously at Derek while chewing his pizza more viciously than usual, Derek bid goodbye to Stiles and his fathers. Overall, it had been pretty successful. He was surprised Dean hadn't ripped Derek's head off when he caught him with an arm around him.
He helped Castiel clear the table and wash the glasses up then kissed his parents good night and dragged his pizza-stuffed body up the stairs to his bedroom. He didn't even bother turning the light on as he pulled his clothes off, tossing them on the floor. He snuggled down into his duvet, a comforting sensation of happiness settling in his chest.
"Judging from how fast you got your clothes off I thought you knew I was here." Stiles jumped at the sound of Derek's voice, alarmingly close to his head.
"Jesus Christ! A warning that you were going to sneak in my room for a second time would have been nice!" He gasped.
"I was going to leave, but we got interrupted earlier." Derek replied, Stiles guessed that he was crouching beside him, his voice was close to his right ear. He pulled the covers tighter around himself, suddenly feeling self conscious of his semi-nude state. "Not to mention you look so tempting in sweatpants."
Goosebumps rose all over Stiles' body, he could feel Derek's breath on his neck and it was doing unholy things to him. He felt the covers on the other side of the bed being lifted as Derek got in with him, he froze completely. Derek wasn't wearing a shirt... Or pants.
Derek pressed himself against Stiles, spooning him. He ran his hands from his thighs, up past his hips to his chest, pulling him close. The skin to skin contact was driving Stiles wild, and he didn't think it could get worse until cold fingers brushed across his nipples. He inhaled sharply, holding his breath as if it would help him regain some self control.
But when Derek ground his hips into Stiles, he was forced to exhale heavily. Derek had one hell of a situation going on in those briefs of his. It made Stiles apprehensive, was he going to have to... He shuddered and Derek nuzzled his neck, inhaling his scent.
"You smell so good when you're turned on." He whispered.
Stiles' own situation jumped to attention at the husky tone of Derek's voice.
"Don't eat me... Heh." He chuckled nervously, he didn't really know how to respond to such a sexual statement.
"I won't eat you." Derek murmured directly by Stiles' ear, causing him to shiver. "But I can't help wanting a taste."
With that, he bit his earlobe lightly, then ran the tip of his tongue from the same spot downwards. Stiles was having a hard time not moaning out loud, and the fear of his parents catching him made a confusing medley of feelings bubble up within him.
But Stiles was a teenage boy, which meant the desires of his head were often swept under the rug by the desires of his nether region. Similarly to that moment, when Derek cupped him unexpectedly and Stiles moaned loudly. The pair froze as a voice floated upstairs.
"Stiles? Are you ok?" It was Cas.
"Uh, yeah pa I'm fine! Just stubbed my toe!" He called back. Derek snorted in amusement.
"Smooth, Winchester."
"Shut up, Hale." He muttered.
Then he realised. It was Cas. The angel that knew full well he hadn't stubbed his toe.
They heard footsteps marching up the stairs and Derek was up and out of the bed faster than you could say "Dean Winchester is coming to kill you." Stiles could just make out the shape of Derek frantically putting on his clothes and leaping out the window. It would have been hilarious, had the situation not been so compromising.
Neither even dared to say good bye.
His door swung open unexpectedly and Stiles jumped. Dean stood in the doorway, a determined look on his face, then he glanced down at Stiles.
"Uh, are you ok?" He asked, scratching the back of his head and glancing around the room awkwardly. Stiles nodded quickly.
Dean cocked his head to the side.
"But you made a- shit. Were you? Oh god kid I'm so sorry I-"
"Dad no! I wasn't doing that!" Stiles exclaimed, blushing profusely.
"It's just it sounded- and Cas said- oh son of a bitch I'm going to bed." Dean stuttered and left the room, shutting the door hard behind him.
"Oh my god." Stiles groaned, smacking himself in the forehead.
"Could have gone worse." Stiles nearly choked in shock when he heard the voice from the window.
"Derek, leave before my dad castrates you!"
Stiles really needed to set some ground rules about the whole 'Derek sneaking in' situation.