"Hullo," says Aziraphale pleasantly as he leads the girls into Greta's apartment. "Thank you so much for making yourself available on such short notice. I do appreciate it." He looks down at Lilly and, after a moment's hesitation, lowers himself into a crouch. "Lilly, this is Greta. She'll be taking care of you for a while, all right? I know she'll be very good to you."

He reaches out and rests a hand gingerly on Lilly's tiny shoulder, giving her what he hopes is an encouraging little smile. "It'll be all right. And you can visit us whenever you like."

Good to add that, surely. It's not like he wants to cut Lilly off from them entirely, and he knows Melanie's grown to care for the little one, just as Lilly's grown used to being with them. But this will be better, undoubtedly. Greta knows what she's doing better than either of them could.