Can the hospital discharge her to a halfway house, or a residential place that can provide better for her needs, and allow you the space you need to take care of yours? This sounds like an unhealthy place for you both to be. You MUST take great care of YOU first, and then worry about others. Im glad you are thinking about how to protect yourself. Can you go visit your someone for the weekend? or have her go to her parents place? or another relative? This is not your child is it?