Oh, I think the wandering is more a matter of wanting to get away from the city physically. So she does want to forget, just preferably not in the vicinity of the home that she thinks of as having ruined, at least partially by herself. (And sure, it wouldn't make a difference if she actually forgot all of what happened, but… human irrationality. It was a spur-of-the-moment thing.)
I was actually originally planning to make her immune to the water, but I decided it would be a bit too much of a deus ex machina.
But anyway, thanks for the kind comment!