Derek nods, gaze flickering down to his mouth a few times. He bites his lip and leans in slowly, lightly bumping their foreheads together like they do sometimes. A blush rises to his cheeks while he does it, but he's desperate not to lose this bond that they've been forming. Bottom line, he's selfish, and he wants Stiles to be his.

His expression is strangely vulnerable as he pulls away, eyes lingering on Stiles' face for a moment before he steps back and turns, unbuttoning his pants and shamelessly kicking them towards his bedroom. He can feel Stiles' eyes on him and it takes everything he has not to look over his shoulder and try to read the look on his face before he steps into the bathroom and shuts the door.