Is Rita a future version of Alice? (Spoiler)
I wasn't sure if I was reading too much into the story but it seemed to me that maybe Rita and Alice might actually represent the same person, just different aspects of the same person. And maybe when Alice dies, she doesn't really die, maybe that is the way in which she conceptualizes growing up and becoming more mature.
Or maybe, it was intended that they are just two different people altogether and I'm just reading too much into it. If that is the case, the ending was really disappointing because of the way in which Alice dies. That would be kind of depressing really.