Crowley watches this and lets out a sigh. "They're going to eat you alive in Hell. Possibly literally. You have to---you know, act like you actually don't care. Except about your clothes, because if you're wearing my clothes I do care what happens to those."

He doesn't even care one iota about his clothing, but entirely about the angel inside of them. If something terrible were to happen to Aziraphale, especially if they thought they were doing it to Crowley, that would be worse than just dying.

"If they attack you, they'd be breaking the truce, they have to know that," he says. He lets out another breath. "Which they might want, because they didn't get a definitive victory."