There is a strange woman sitting at one of the tables at the soup kitchen, writing at a desk. Both the non-volunteer adult and the expensive electronic device are very out of place.
The door opens from the inside, too, right? Assuming that's the case he can come out either when he decides to or when it's getting close to when they have to leave.
Carlotta opens her desk and reads her messages and makes an annoyed noise at one of them and deflates the air mattress and the flight doesn't leave for several hours but they can leave sooner than that if he wants.
Well, the apartment is pretty small. They can leave and get breakfast somewhere that has things other than oatmeal. How does Martin feel about crepes?
Carlotta has an apartment in London; it's not huge but it does have a guest room that can be converted into a not-guest room. With a door that locks from the inside. Once they arrive Carlotta gets started on the adoption/legal identity process.
"...I don't suppose you know your birthdate."
"Okay." She puts down the day they met, because why not. She finishes the paperwork. She gets him an ebook reader and digital books, because he is going through the books he has too quickly for continuing to get him paper books to be storage-sustainable.
"I didn't want to bring it up at all until you were more confident that I wasn't going to kick you out to starve if you said no."