Rules for interacting with a sourwolf: Rule 13.

13: Derek hale can be a gentleman

So they were dating.

More due to stiles' stubbornness than anything else because Derek had been pretty insistent on waiting until he turned 18 but that was 9 months away and stiles was not waiting that long. It wasn't his fault he wasn't born early enough and he wasn't going to be punished for it.

But there were rules.

Derek enforced rules not stiles made rules.

Stiles had to actually listen to him, meaning he couldn't wander off into the woods by himself with dangerous creatures on the loose. (His boyfriend was no fun.)

No sex. (Derek really was NO fun. )

They had to tell his dad.

Now stiles understood the first two to an extent, he really did. Well the first one a hell of a lot more than the second but still he understood them both. But the third one…. That one made him more than a little nervous.

"Remind me why we have to tell my dad again, I like this, the whole you being alive and out of jail and me not being grounded until I'm dead." Stiles said pouting at Derek who was sitting at the end of his bed.

"I'm not sneaking around stiles. If we are doing this we are doing it right, or not at all." Derek replied face stoic.

Stiles flopped back down onto his bed, " it's your funeral." He groaned.

Derek snickered, "I'm very hard to kill." He replied grabbing stiles' hand and dragging him towards the door. "Come on stiles you have to go let me in the door." He said pushing his boyfriend out his bedroom door before climbing out the window so he could go stand at the front door. A much more acceptable way to meet your boyfriend's parent: the sheriff.

Stiles walked down the stairs and glanced up at his dad who was sitting at the table.

Now or never right.

"So dad, um someone's going to knock on the door in about ten seconds, and it's my boyfriend and I'd appreciate it if you didn't shoot or arrest him until we're done explaining." He said rushing through the words before yanking open the door right after Derek knocked.

His father didn't really look amused, actually he looked more like he wanted to shoot Derek in the head but he didn't.

"explain." He said gesturing to the chairs in front of him.

And they did, they explained everything.

From werewolves to Derek's house fire. They told him about Scott, and Isaac, and Jackson, and Lydia, and Erica, and Boyd and Danny. They talked about peter and how many laws they had broken, and how many lives they had saved because they did it. And lastly they talked about them,. Stiles had expected to do most of the talking, and for the most part he had. But when he started to speak about Derek, and how it wasn't his fault, and how stiles had pretty much assaulted him in the woods and forced him to cuddle with him. Derek cut him off.

"listen sir, I'm pretty sure this isn't what you want to hear from your son's 20 year old werewolf boyfriend that you didn't even know existed until an hour ago. But I love stiles, a lot, and I'm not sure you realize but that's kind of a big deal for me." He said twiddling his thumbs absentmindedly.

"And I'm trying, really hard to do this as right as I possibly can, because I'd really like to not mess it all up. So if you'd like me to go away, I'll do that but I'd really much rather just have your permission." He said.

Stiles didn't really know what to think of that, firstly, he didn't think he had ever heard Derek talk so much all at once. Secondly he didn't think he had ever wanted to kiss the nervous look off his face as much as he did right now and he was sure he was looking at him like he was the most beautiful thing to ever grace the earth, but that was because… well he was.

Stiles opened his mouth to talk, but no words came out and he ended up just kind of looking like a fish.

His father laughed, "I take it you didn't explain all of that to stiles," he said gesturing to his sons lack of words.

"Not in so many words." Derek replied with an awkward smile, "I figured it might be helpful if he was shocked enough to not speak for a minute."

That was a joke.

Stiles was sure that was a joke.

His dad laughed, and stiles continued to look like a gaping fish.

"keep him safe, nothing happens under my roof until he is 18 and I'll try to avoid shooting you if I find out that it does got it?" his dad said smiling.

That went a lot better than he thought it would. Derek nodded and stiles successfully shut his mouth for a moment as the sheriff explained he had to go to work before shaking Derek's hand and saying it was nice to meet him and walking out the door.

"You just told my dad that you love me, and asked permission to date me." Stiles finally said, you would have thought with as much thinking he had just done he could have come up with something a little bit more articulate than that, but no.

"yes." Derek replied.

"And he said yes." Stiles said

" I know, I was there." Derek said smiling at how much of a dork his boyfriend was.

Stiles fell back onto the couch with a grin, pulling Derek down with him to use as a pillow and laughing when he scowled but allowed stiles to pull him down none the less.

"Derek." He said looking up at him inquisitively. "Do werewolves mate for life… like wolves?" he asked thinking about Scott and Allison, and now Scott and Isaac.

Derek thought about how to put the answer for a moment before speaking, "if they find the right mate. If not they'll settle for someone they may think is their mate… but isn't."

Stiles thought about it a moment, "so Scott thought Allison was his mate… and then he met Isaac?" he asked.

"Yes."

"So, how do you know you've got the right mate?" stiles asked, half worried that Derek was going to stumble upon his mate and leave him.

"A mate will be an anchor, a friend, a part of your pack, and someone who challenges you to be better. When you meet them, you'll know." He replied taking a breath, "it might take a little while to come to terms with, especially if your mate is the underage son of a sheriff who hides his scent under too much medicine." Derek said smiling, "but you'll know."

Stiles let out a happy sigh of relief before nodding and twining his fingers into Derek's and turning on the TV. When he woke up later he was laying in his bed with a not on his pillow.

"Training. Feel free to come over if you'd like, but I'll be back to check on you later. Love-derebear."

Stiles grinned at the note, pulling out his journal to write another rule.

Rule 13: Derek Hale can be gentlemen.