Holy crap. Scifi girl is right. She just described my W and I perfectly. That is the same exact set of circumstances, the only differenc is that I didn't know how bad it was financially because she did the bills and never communicated to me just how bad it was. So I didn't look for another job. Then we went bankrupt. After I found out, I did look for a job though and found one. But it was too late for her. I had a hand in this. OM didn't even come into the picture until she realized how unhappy she was. I share the burden of this mess. This he'll I am in is kind of like penance.
Bullchit. Even if she was HORRIBLY unhappy, and it was ENTIRELY your fault (not likely), it doesn't excuse her decision to walk away. She had an obligation to sit you down and try to work at it. That would be the "for worse" part of the "for better or for worse," btw.