Multiple Personalities Support Group
Dissociative identity disorder is a diagnosis described as the existence in an individual of two or more distinct identities or personalities, each with its own pattern of perceiving and interacting with the environment. At least two of these personalities are considered to routinely take control of the individual's behavior, and there is also some associated memory loss,...

I'm so so sorry that you're trapped in this situation. I have no advice to offer, only the hope that you're free of him in the very near future
a few years ago (or ok, decades?) my sister didnt even think anything had ever happened to me, but after lots of talking, work, and time they both know way more about my situation. and they are ok with me stepping out of the care taking role.
i have seen the last of my dad. he can go when he wants...soon i hope, but i am not seeing him ever again. and i have slept better this week than my whole life!!