I sympathise entirely with your position salyann.
For those who have grown up and made an appropriate adjustment in their parental relationship from parent and child to mutually respectful and supportive adults, it is very hard to imagine the circumstances where people like you and me have been manipulated into adulthood, and remain so, even though we know it is wrong.
It does take strength to break away, but it has to be the best in the end.
My mother was an emotional blackmailer, and took against my girlfriend and children, so that I split from her and didn't see or hear from her for over six years, during which time we had a third daughter together.
Relations were re-esbatlished, but have remained distant to the point of bus queue conversation when I have made myself visit. She never wanted any of my family, never ever had anything to do with my children. She is now ninety-four and no longer recognises me, so I have stopped visiting. It hurts me and she knows no different.
When she dies, I will mourn the relationship I should have had, not the one I did have, and then I will carry on with the important people who are left.
She did not deserve my love or my pain, and your father does not deserve yours.
Your love belongs to your husband first, your children if you have any, and your parents - in that order.
He is abusing your love, and it's time to stop. he can behave like your dad, or be without you.
His choice.