[there's a long tense moment where it seems like he won't, where it seems like he'll just hold Wei Wuxian pinned down on him until one or both of them go mad, but then he braces his feet and finally starts to fuck up into him properly, keeping it in that same measured rhythm, only gradually faster, but hard and steady all the while, filling and filling him. he's kissing frantically at his jaw and neck while he does it, biting at his ear]