[Lan Wangji can feel his own heartbeat throb in his temples, feel the need to bite him, to hoard him close and not let him go--not foreign impulses at all, just strengthened by his partial transformation.

he doesn't--he doesn't intend to go farther than this, he reminds himself, not right now, but he's growing hard against Wei Wuxian's body again, powers in full force and his monstrous stamina with them, and it would be so easy to just remove his fingers, listen to Wei Wuxian beg to be filled again, take it as permission to fuck him fully--

wraps his other hand around Wei Wuxian's cock again instead, stroking him in a rhythm, the pace picking up.]