The pleased hum Tony gives in response is only partially to the bite. For all their talk about domination, it's nice to know that they can still just spend a while giving each other playful hell, even when wrapped up like this. It's comfortable, in a weird way.

"My space, my rules," he agrees, a slight smile playing over his mouth. Nevermind that the whole building is technically his space.

And like he's trying to prove it, he tugs gently at Steve's hair, just enough to coax him away from his throat. As Tony's head comes back down he just studies Steve for a moment, fingers absently rubbing against Steve's scalp. Satisfied with whatever he was looking for, the smile quirks up a bit higher and he leans in to kiss him again.