I am curious, Lynn. He's a bastard to you, but how does he treat your daughters? This guy really doesn't sound like the greatest Father figure, but since you enduring all of this for the sake of your children, I assume he isn't harming them in some way either.
My feeling is that the best gift you can give your children is happy parents. Providing for the life style and qaulity of living that they are used to cannot possibly be more important than their - and your - well being.
All in all, I am disgusted that some one as lovely as you is stuck with someone who acts as outrageously as he does.

You are very strong.