considering 2 things, the fact that she's blaming you for how she acts and is, and two, she's got a history of acting this way, even in the best case, where she gets help, you need to get out of the situation before anyone gets hurt. Had the situation with her father happen with one of the kids and they got in the way, she'd get her kids taken away, even worse, if that happened they might keep them from you for a time for safety's sake. She's not facing the fact that she is responsible for her actions and that it's something in her that she's had a long time, but making it seem like it's you instead.