It is very unusual. Even there, not very many people get the opportunity to travel between them. Most people don't know there are other worlds.

[ Her flicker of a smile is brief, especially because coming up with an accurate response leads her mind back toward more sobering thoughts. It takes a beat or two before she admits, ]

... This one.

[ Which is an unfortunate thing to have to say, she thinks, considering the circumstances, and the corners of her mouth tug ever lower. (It's one of those times she almost regrets her own truthfulness.) ]

The places I lived before - I was never as happy there as I have been here.