I can feel your pain and confusion as I read your posts... your W is puzzling for sure.
I don't know much about depression but it certainly sounds like that's her state of mind. Does she have any family you can talk to, to get insight and possible help? Or do you and her share the same doctor? I know HIPPA prevents medical professionals from discussing other peoples' health, but if you know the doctor, maybe you can meet with them and express your concerns about her to see if they can offer advice.
How to handle mental health is a tricky issue. If someone is physically sick, one would do everything they can to help. If someone has a mental condition, it's hard to know if their decision making is what they really want, or if it's a symptom of their sickness and that one should intervene. I am not sure what one should do.
Me: 43 W: 37 Together: 18 M: 15 D: 8 yrs old ILYBNILWY: March 2011 She Filed for D: August 2011 She moved out: Sept 1, 2011 Reconciled: May 2012 Divorce Case dropped: July 2012