He worked the fingers more, and Stiles seemed to be liking it. Then he slid a condom onto his already hardening cock (he'd come easily when Stiles had been touching him) with some lube, and parted Stiles' legs easily. The tip of his cock settled at the pucker of Stiles' anus, and then he was slipping inside him, slowly. He didn't want to hurt him. He wasn't sure when it had been decided that Stiles would be the bottom, but he knew that it didn't really matter, it was the thought that counted and this was amazing.
Leaning down, as his hips set a steady but slow pace, he kissed Stiles, nibbling on his bottom lip, deepening the kiss. He loved the way Stiles felt around his cock, so nice and tight. "I'm not hurting you, right?" Scott asked breathlessly against the other boy's lips, his free hand still cupping Stiles' ballsac. He cupped and tickled them, as his hips moved. He wanted to go faster, but only if Stiles said it was okay. Even though he'd used his fingers to warm him up that didn't mean that he couldn't hurt the other boy.
God, Scott loved him. He wasn't sure if that was the time to say so, because he wasn't sure where Stiles' head was with this, but it was true. This was all he had dreamed of and more. He kissed him deeper, his free hand moving up to stroke his lover's strong abs, moving along the pelvis bone. He finally uttered the words, soft and breathless.
"I love you Stiles, FUCK OH GOD." He said, as he slipped even deeper inside Stiles, slowly of course.