"Consider it done." There's no hesitation there, because it's something he would have given Bucky even without his own nightmares. That's not something he'd ever get upset about when there are people out there doing things on purpose. Being woken up by something someone else can't control doesn't really make the list of things that would bother Steve.

He reaches next to his bed for a book and the little book light he'd been allowed to keep. "Will it keep you up if I'm reading down here? I don't think I'm going back to sleep after that."

And he doesn't have anything to be awake for, anyway. It doesn't matter if he's tired tomorrow, so he might as well not pretend. He's always been able to get by on less sleep, anyway.