Your literature says it will help 3 of 4 marriages in crisis. I wonder if ours is the 4th?

My wife is not a Christian or at least has not had a renewal of her mind as a Christ follower. She is self-destructive in her thinking. She is unhappy and wants to be alone to make up her mind.
She has already had at least two "emotional relationships" with men in prison via email and phone calling.
I would not consider getting back together with her until she takes her spiritual life seriously.
She  has 2 dogs that she loves more than anything or anybody and she is at least 60 lbs overweight and getting heavier as she eats every thing that is wrong. She is physically weak with a coupe of serious issues, but she will not try to take care of herself. She sleeps constantly because she is so very weak and I fear she will die in a few short years. These are strongholds of the mind.
She says she is angry that her former husband divorced her and she lost her mother last November.
I would say that she is Self-Destructive and needs some mental help before a marriage could be re-established.
I am praying for GOD to intervene in her life as I can not do anything to help her. We separated three weeks ago for the third time in 15 months. She says that she wants a divorce but it's not my fault.
I don't know what else to do.

Thank you Joe!

I feel like it is my duty as a Christian that even though she doesn't consider us as married; Don't I have a duty to pray for her, at least until the divorce?

I wish people would post more success stories on the forums.  I'm at wits end, don't know if this would be the answer.  I love my wife and want to make our marriage work.  I think she would be totally opposed to attending anyway; she would just consider it a complete waste of her time.  She would use every excuse in the book:"We cant afford it, i cant take time off of work, I'm not going away for the weekend with you."  Her only focus is her; not doing her Motherly duties.  At this point, I just want our Son to have His Mom back...............