Derek sat there watching the pack play around. Erica, Allison and Lydia were talking boys and doing each other's hair. Boyd and Jackson were arm wrestling which turned into all out wrestling. While Scott and Isaac were racing up trees and Stiles had to judge who made it to the top first.
At one point Erica ran over to Stiles because Jackson had hit her while he and Boyd were wrestling. Stiles of course held her hurt arm in his hands as gently as he could, though he knew it had healed by now. But still he called Jackson over to apologize, which he reluctantly did before Stiles patted Erica's arm and she hurried back over to the other girls.
It was weird at first when the pack members started to listen to Stiles like they listened to Derek; sometimes they listened to Stiles better though. But Derek didn't really care; he liked watching Stiles care for the pack. It gave him a really warm feeling, especially when Stiles would sigh and come over to sit by him.
Derek would just watch Stiles while he sat there and called or waved to the pack. There was just something so entrancing about the boy sitting beside him that he didn't notice the girls were giggling and the boys were giving him odd looks, until Stiles looked over at him but he was quickly looking away. They would all stay out there until the moon was high in the sky and then the wolves would howl. The humans occasionally mimicking the howls the best they could.
Lydia and Allison would curl up with the betas when it started to get cold. While Stiles would carefully shift closer to Derek, the alpha would glance down at him before shrugging off his jacket to put it around Stiles. The teen would look up at Derek with a look of slight surprise before curling up to his side. And Derek wouldn't push him away like he'd done with others; instead he'd put his arm around Stiles and hold him close.
They would all fall asleep curled together when they got back to the house. Though Derek would leave the pile sometime early in the morning, which would wake Stiles who was still snuggling in Derek's jacket. The teen would get up and look around before going to sit out on the porch and wait for Derek to come back. The others would sleep through this because they knew it was coming.
When Derek would come back from running, he would be shirtless and sweaty and Stiles would blush at the sight. But he wouldn't say anything, instead he would just sit there and Derek would sit beside him. They never really needed words, so instead Stiles would reach out and put his hand on Derek's and the alpha would lace their fingers together before leaning over to kiss Stiles.
And the pack would watch from the window, all smiling and jumpy with happiness until Derek would look their way and they would all scramble to not get in trouble for spying. But Derek didn't care if they watched he knew what it meant for the betas to know their alphas really loved each other. So when Isaac came out asking for breakfast Stiles would kiss Derek once more before getting up to make breakfast and Derek would be left to smile at all he had now.