I understand this frustration. I'm in the same boat. My W claims I stopped being her friend, partner, and lover after D was born, but she forgets how I was by her side while she was in chronic pain b/c of her endo night after night.
My fear is a lot like Kerry's -- Our spouses will never wake up and take any sort of responsibility. They can't or won't ever be willing to face their role and themselves. That is what is so sad.
However, if we continue to do everything we have to do to become stronger people and better parents, in the end, our children will know it wasn't us who broke up our little families.
I guess that is all we can cling to right now. Doing what is right to show and set the proper examples for our children, regardless of how this all shakes out for us in the end.