'Stay safe' isn't the most useful instruction, Melanie thinks. Knowing what the Devil looks like - and knowing to avoid him in dreams - is good information to have, but her safety in the waking world is entirely dependent on Aziraphale. If something happens to him, or to the magic keeping her in the flat, then what?

But it's worse than that, because her safety is dependent on Crowley, too. He could get in here as easily as Aziraphale could; she's already seen him do it. And he's scared enough of the Devil to let himself be commanded by him (something that Melanie finds difficult to imagine despite what she's already seen). Scared people do stupid things.

She knows Aziraphale won't like hearing it, but she has to ask. "What if Crowley tells the Devil about me? Or what if the Devil finds out about me some other way, and asks Crowley to fetch me?"