"Oh, you like that?" Stiles pants, feeling smug even though he can't really express it. "You want to taste me? When we're alone at night, when our pups are sleeping, and I'm full of milk- achingly full-" he gave a little tremble, clenching around Derek. "You'll want to help me, want to ease the ache until I feed our babies again."
He hadn't realised how much he wanted that. But he should have, because he loved Derek's mouth on his nipples, and it would be just as sexy when he was sharing what his body had for the children they'd made together.
He wanted to feel it now, he wanted to feel a new life growing inside him, wanted to see and hear Derek's reactions to his body.
Stiles hummed at the nuzzling, Derek's breath warm against his skin. "Yes," he whispered. "I want you to mark me, Derek. I want you to bite me, I want you to claim me. I want to be yours-" he knew that Derek would, that they'd be mated properly then, before Stiles was pregnant. "And I'll bite you, I'll mark you."
His fingers carded through Derek's hair slowly, petting him, adoring him. Derek was still nuzzling against his neck.
"Do you- you want to do it now?" he whispered. It wasn't as though he needed time to think about it. It wasn't though he was ever going to change his mind. Stiles' fingers tightened, holding Derek's mouth in place. "You want to claim me now? Make me yours so that everyone can see?"
Derek was inside him, his knot was still so big, he wasn't going to be pulling out any time soon.
"Is it going to hurt?" Stiles asked quietly. He wanted it, he was always going to want it, but he needed to be prepared.