He grew old and is dying in this system of things. He is a hateful, miserable humanoid. You are a loving mom, and partner, and in spite of them, a loving daughter and sister. You WIN.
He can't hurt you or help you anymore. You are nicer than I would be to the miserable old coot. Go there, say goodbye and once again be the bigger person. Tell you mom that you are here for her and give her contact info surreptitiously-you never know what she will do with her freedom.
You are a rock star.