You Have The Power
Face it. People do awful things, some are pros at it. You get to choose who you want in your life. Just because you are related or have until now filled a certain role, you do not have to continue.
It is your life, your choice. Only YOU can change how and with whom you live. Bastards be gone!
Working through these choices can take time, support and courage.
Take all the time you need for change. Take baby steps. Review and adjust and repeat.
This is YOUR life and you get to choose who is in it.