Hey TMU - I've read this thread but not part 1 yet. I'll have to read that at home. Forgive me if you have already answered these initial ?'s ....
Is your wife interested in getting individual counseling? She really sounds like she needs it.
Has she seen a doctor for the depression?
Does she drink often?
Let me think about your sitch for a while and I'll get back with you. It has a few similarities to mine when my head was all screwed up. At one point, after H & I separated the 1st time, he came home, figuring he could fight for the marriage better from the same house. But all that did was make me angrier although I did get rid of OM at that time because it was just too stressful and I was also seeing sides to him that I didn't like. H & I separated again after 15 months of a stand-off and it was THAT time, when I was all alone, that the change began in me, ending up with me here and DBing my head off with slow, but good, results so far.
Your actions at this point can make all the difference but I know it is hard for you to remain optimistic and upbeat in the face of all this attitude and disrespect from her.