She went off her anti-depressants. Not sure when exactly this happened, but it was in the last 4-6 weeks.
This explains a lot doesn't it? She probably went off them right before you and D moved in with her.
Anyway, sounds like you guys are getting along well enough, that's great. You guys obviously have a great friendship...this is a great place to start! J~
M 35 H 29 M 4 yrs T 9 yrs D 3 S born 10/19/07 Bomb 09/10/07 Separated next day OW - broke up and H moved out 09/07/08 Status - still figuring this out