Derek left the summer before senior year, he left Isaac with the McCalls and went to find Erica and Boyd with Peter. He left to give Scott, Stiles and Isaac a chance at being normal teenagers. Trouble seemed to follow him so leaving was the best option, The alpha pack came for him and because of him Stiles and Isaac nearly died, so leaving was for the best.
He told them all separately, Scott first, Scott didn't seem to bothered by it. Then he told Isaac who wanted to go with him but in the end understood why he couldn't.
The night before they were leaving, he went to tell Stiles. The thing he and Stiles had was strange and undefinable for Derek. They fought and annoyed each other. They listened to one another on pack stuff. In a way they even trusted each other but they weren't friends. Peter would joke about the sexual tension between the two but Derek couldn't even hope about something like that being true, Stiles was barely seventeen.
Derek crawled into Stiles window and startled the younger boy for one last time before explaining what was going to happen. Stiles was quiet and Derek didn't even see it coming when the human's lips where on his.
Derek left that night, leaving Stiles naked and alone. Derek whispered his final goodbyes before slinking out of the window and running off towards the woods to meet Peter.
Derek contacted Isaac first when they had found out that Erica and Boyd were in fact dead. Isaac was studying at Wesleyan University with Scott. Isaac had told him that things were different. He told Derek not to come and visit him but instead to go back to Beacon Hills to see Stiles.
Derek had been confused at first, not understanding why Stiles wasn't aslo at school somewhere, knowing that the younger boy had talked about Stanford and Columbia.
Derek got his answer when he arrived in Beacon hills and drove past Stiles house. Stiles had been standing beside his same old ratty jeep with a toddler propped on his hip and from what Derek could see and hear there was another one in there aswell.
Although it still didn't explain why Isaac had wanted him to go back, so Stiles knock somebody up, a werewolf from what Derek could tell but it's not like Stiles was ever his. He had no business in Stiles' life anymore, not that he ever had.
Derek walked up to the Stilinski home listening to make sure that Stiles was the only one there and then rang the doorbell once. Stiles opened the door with a goofy grin on his face.
"Did you forg- Derek" Stiles said the last part in a hushed whisper.
"Stiles" Derek countered, not knowing what else to say.
"What the hell are you doing here" Stiles was angry now. Why shouldn't he be, Derek has been gone, he left over two years ago and there hasn't been a word from him since.
"Ermh Isaac said that I should" Derek shrugged, looking unsure.
"You shouldn't have, I don't want you here!" Stiles shouted. Stiles slammed the door in Derek's face and then sunk to the floor infront of it.
Stiles was fuming, who the hell did Derek think he was just showing up after so much time. He left, even after they had been together. He still left. Stiles had needed him and he wasn't there. Stiles had been alone for the last two years and he sure as hell didn't need Derek now.
Stiles sat alone in his room like he did most nights and watched the two sleeping figures in the crib near the end of his bed. The lamp on his desk was shining and he could make out their identical faces. Dark hair that was inching further and further towards their large brown eyes. Even to look at them Stiles was reminded of Derek, they had his nose not to mention his temperament and wolfy abilities. Stiles knows that they were a mistake, he was seventeen and Derek was gone, he is also a male but that's just another crazy thing to add onto the list of crazy in Beacon hills. But they are certainly the best mistake he has ever made.
Derek wasn't stupid, he could be slow on keeping up with some things and even a little dense but he wasn't stupid. Obviously something had happened to Stiles while he was gone, something bigger then becoming a father at such a young age.
Stiles was in his driveway again when Derek approached for the second time. Stiles was putting a diaper bag on the floor of the jeep and look up at his son.
"All strapped in?" Stiles asked. His son nodded.
"Stiles?" Derek said from somewhere behind him. Stiles jump and Derek had to suppress the urge to grin at his antics.
"I thought I told you to go away" Stiles muttered.
"I didn't listen" Derek said with his usual cocky smirk.
"Well that's a first" Stiles said rolling his eyes and sighed.
"What happened, Stiles?" Derek asked.
Now Stiles was really mad, what happened, What happened. He left and Stiles was fucking pregnant, that's what fucking happened.
"Just leave Derek" Stiles gritted out and climbed into the jeep before driving off and leaving a confused Derek in his wake.
Stiles had to pull over to the side of the road to compose himself, He could hear Charlie and Logan giggling at each other in the back seat. Stiles has been mad at Derek for a long time now, but maybe he deserved to know about them. Stiles isn't even sure about how he'll take it. He'll probably freak out and leave again. Stiles isn't even sure how he would feel if Derek was to leave again.
Okay so if anybody is interested in this I'll continue it. I asked on tumblr what to name the boys and I got great suggestions like Sam and Dean and Skoll and Hati but in the end I went with Logan and Charlie. Because I can totally see Stiles naming his kids after Wolverine and Professor X :) Please Review !