Relief rushes through Stiles like a current, almost overwhelming in its intensity. He opens up under Derek, slides his tongue out and pressing insistently into the other man's mouth to deepen the kiss. His arms loop around Derek's neck to pull him- himself- closer.

It's selfish of him, he knows, but he doesn't want Derek to leave- to leave him. He just doesn't. Derek belongs here, even if it winds up not being with him, but he does. And he needs Derek to see that.

A little groan escapes him, tongues winding together, but Stiles doesn't push for more than that, despite his body's desperate want for more. He won't do that to Derek. He's not like them, he won't ever be. Derek is someone to be cared for and cherished, not used the way they had used him.