Seriously, I didn't notice anything missing. There could be something, I guess, but I can't see what.
As for the things you mentioned:
The name: eh? She doesn't have a name? o_O I thought it was mentioned once or twice. It was a few days ago that I read this, though; so my memory I guess isn't 100% up to par.
Hmm... a name could be good to fit in there. It would help, at the very least, to give people a name to refer to your main character by when they think about the story afterwards. ^_^
The mother: I found that scene fine. Because I think you'd already talked about the mother a lot, or at least as I reader I got a sense of her through what the main character remembered, the mother already has a set role/personality/character/whatever that should be called.
Also, I remember when I was reading what the mother was saying in that dream sequence that I just took her words as though the mother was talking to a young child; so the simplicity of the statement and the way she said things seemed to fit well.
Adding to the childhood home's setting: I guess you could add a little bit, but don't overdo it, if you can help that. It flows naturally as is (at least in my opinion), although you could add a bit more writing to that scene to point out some more um... 'points' (can't think of a better word at this point in time, heh ^_^" ).