Your story gave me a warm, homey feeling and reminded me of my childhood.
My mother and father are dead, which is good. My stepfather is dead, which is a little sad but also good. My stepmother, I will never speak to again. (If necessary, I will hire a lawyer to speak one word for me to her, which will be "No.")
I can't think of a better way for a father to permanently alienate and make an enemy of his own daughter. The life lessons here: might makes right, money is power, and speaking truth in private if discovered by the powerful will be viciously punished.
She won't be picking a good nursing home for him. He'll never see his grandchildren.