You do not have to explain yourself to her! She will expect you to be doing what she is doing. If she thinks that, so be it. I would not answer any of her blaming questions or respond to any of her comments. Until she is making an effort on the marriage, she would cease to exist. Contrary to what some may think, I think that would be being overly nice about it. Angry Andy's post of the day.
God is love, love is blind, Ray Charles is blind......so there.