There's nothing quite like getting yanked out of a dead sleep by a phone call, especially when you don't even know the person on the other end. But when you're as used to crazy as Steve, staying on the line doesn't seem like a bad idea at all.
Steve had one job: exchange a couple of texts with a guy who thought he had Natasha's number, and let him down gently. It ends up being a lot more complicated than that.