There was silence for a moment, the fumbling curiosity and the slide of overeager hands weighed tangibly on the backs and necks of the two zealous participants. Finally one of the sweet intoxicating caresses developed an icarus complex, and moved too close to it's goal, resulting in the offending hand being grasped and pushed gently away.

At the following whine, Stiles pressed an apologetic kiss to his lover's lips "Derek, we can't do this here, we can't have sex in my house. Or even anywhere near it. Not if we want to keep this under wraps. One of my dads is so battle hardened by death that he's on a razor's edge of awareness 24/7. The other is a preternatural angelic being. I'm actually surprised they don't know already. Cas probably does" He heaved a deep sigh and rested his forehead against Derek's "I'm sorry. I wish we didn't have to sneak around"

Derek gave an amused but somewhat self-deprecating snort "It's not your fault your dad hates me. I had to be the jackass that wolfed out and acted like a total dick when the hunter came to investigate" Stiles chuckled and rubbed their noses together "To be fair, it was his first inspection, and he had no way of knowing not to mention the Kate. I mean I know she was an evil crazy bitch, but before she went rogue they were friends - good friends. I'm pretty sure the Argents are one of his last ties to his dad besides uncle Sam and uncle Bobby" his tone had changed from playful to guilty as he spoke and Derek shushed him "Hey hey now, you don't need to feel bad about it. It may still hurt but it's not your fault what happened with your dad. He hates me for a good reason. For all I know he's right, I love you but…I probably shouldn't be anywhere near you"

Stiles frowned deeply at this and leaned forward to nip at his ear "Stop it, you know how I feel about hearing you talk like that. Besides, that little thing? May have stung for a while but god knows he's seen worse. I've hurt him worse during trainings and practice jobs and they haven't gotten rid of me yet. I don't think he hates you, he needs a lot of time to learn to trust people. He can't possibly hate someone I love so much" he brought their foreheads together again and they locked eyes "What do you think, big guy?"

Derek made a soft contemplative noise "Well I guess we could try and wean them onto the idea slowly, you help get me on his good side and then we tell them both. It's not like this is romeo and Juliet here Stiles, we've been dating for like more than a year. I feel like you're right; they're your parents and they deserve to know" he brought his face down to nuzzle into Stiles' neck, and pulled his arms tighter around him. For a wonderfully happy span of eight seconds they were perfectly content and warm and blissful. Until the door flew open and Dean stormed in furiously, Cas right behind him looking rather sheepish.

"A year?"
"DAD!" Stiles and Derek rushed to sit up, thankfully they were still fully clothed.
"You little bastards have been dating under our noses for A YEAR?"
"Well really a lot more like eighteen months, dad"
"And you thought it'd just be cool to not tell us?-"
"Well to be fair Dean, I knew "
Dean whirled around "Hold it, you were in on this?"

Cas fidgeted awkwardly "They were happy. If anything had been amiss I would not have overlooked it, you know that Dean"

Dean gave an angry sigh and sat heavily in Stiles' computer chair, spinning around to face them again. He briefly pinched the bridge of his nose.

"Alright, welcome to the Spanish Inquisition, kids. You're gonna sit there and feel guilty for lying to me and you're gonna answer my questions. And don't even think of telling me anything but the absolute truth, because horsefeathers over here is gonna play polygraph-"
"Im not a-"
"Just tell me if they lie okay Cas?"
"Oh. Yes, I can do that Dean"

"Okay question one, Stiles…Slava"
"Dad-"
"Vyacheslav Winchestor"
"Dad"
"Slava…why did you hide this from us?" Stiles was about to snap out something about stubborn fathers, but he saw what Dean was trying to stow away beneath the surface. There was hurt on his face, and that was something his son was pretty much an expert at seeing. So he began tentatively, hesitant and gentle.

"Dad, how could I tell you? You hate him"
"Since exactly when? I don't have anything against the guy except for finding him in my underage son's bed" he glared at Derek halfheartedly
"What are you talking about you don't hate him?"
"How could I be any clearer Slava, I don't hate him. Are you trying to make me out to be prejudice or somethin? You think I would hate him because he's a werewolf?" Stiles and Derek shared a bewildered glance

"Mr Winchester, we know you're not prejudiced but…I put you in the hospital. You were in traction for like three weeks. How can you not hate me?
Dean was silent for a moment, then he spun around in the chair

"CAS" "Yes Dean?" "You been messin with my memories again?" "Only a little. For the greater good, and the happiness of our child" Stiles stood up, head shaking and arms flailing.

"Hang on so you don't remember at all?" Dean looked at him, and then stared askance at Derek suspiciously

"No, should I? What happened?" Stiles moved to sit on the ground next to him
"Well, you went on an inspection call to make sure Derek was keeping up his end of your treaty. You mentioned Kate Argent, the hunter who burned down his house with his entire family in it, and said she was a close personal friend. He took it the wrong way, went nuts, and basically turned your chest into a pulled pork sandwich"

"And Cas, you erased this from my memory because?"
"Their love was only just blossoming Dean, it had to be delicately nurtured. I didn't think they would hide it for this long, but to be fair they were discussing telling us when we came in"

"Okay, so why didn't Stiles realize that I had forgotten?"
"I did it gradually,can you imagine how awkward it would have been if you had woken up with a wound you didn't remember getting? It wasn't gone from your mind until a time when it was appropriate to stop talking about" Stiles chuckled and muttered "Yeah dad like you're not the king of awkward" Dean shook his head wistfully

"Okay so that explains the giant scar on my chest. Moving right along. Derek"
"yes?"
"How old are you really. And I don't want the number on your driver's license"
"Umm…ijustturnedthirtysevenlastweek"

A pause. Then Dean stood and stalked over to Derek, grabbing him by his shirtcollar and pulling him to his feet. When his voice came out it was almost a hiss "You're kidding. And you're dating my seventeen year old son?"
"Dad come on he's emotionally twelve"
"Can it Vyacheslav"

"Mr Winchester please, Stiles is actually kinda right"
"What, that you're 'emotionally constipated'?" Derek blushed faintly
"I…I wouldn't say constipated, but…Werewolves aren't human. We age and mature so much more slowly because we live longer. Especially born wolves. You're a hunter Mr Winchester, you know it's true. In wolf terms I'm barely a teenager"
"Goddamnit of course I know that, but that doesn't change the fact that you're a thirty seven year old man trying to get with my son! You're more than twice his age and-" he was interrupted by a girlish squeal "BUT DADDY I LOVE HIM"

Everyone turned to glare at Stiles. Derek frowned and mouthed at him "Really Stiles?" Dean sighed again, ignoring Cas who looked blissfully happy, and was probably thinking something along the lines of 'he hasn't called dean daddy in years. such a precious child'. Stiles cleared his throat and stood, "what's being clearly overlooked is the fact that Derek and I love each other. Very much" he reached and took Dean's hands

"I'm sorry we lied to you dad. You taught me better than that and I regret it. And I'm sorry he's a lot older than me, but I can't change that either. And I'm also sorry that Dad erased your memories but I wasn't in on that one so there's nothing I can do about that. It's just…you need to know that what we have is real" he backed away to stand by Derek and they clasped hands. Dean looked at Cas, who raised his eyebrows and nodded silently. He huffed on last time and when he spoke it was growley, but no one called him on it "You have my blessing"

Stiles jumped up and down threw his arms around Derek's neck and kissed him on the cheek, then ran over and did the same to Cas and then Dean. And to be fair, Dean stayed strong and silent right up until Cas turned to him and asked him if Derek was part of their ohana now. And then he shed several incredibly manly tears.

There was group hugging, and from that point on they were pretty much all happy, even if sometimes Dean and Derek pretended to hate each other and be territorial. And no, thank you, Dean was so not ready to have the "gossip about our supernatural boyfriends" conversation with his son. Though, bless him, that never seemed to stop Stiles from trying.