My thoughts are that she only started getting more friendly when she moved out.
Perhaps it seems a bit 'final' to her and she's scared? After all, before she was in the marital home (your home), which is part of you, so she never had to let go completely.
Now she's in this new place, the implications of her D may be hitting her. I think she is having a little trouble detaching from you.
Can't post anymore as Andy will be here in a minute.
