Hang in there Nikko, it will get worse before it gets better I'm afraid but you did the right thing. You can't deal with her anymore and she is treating you like dirt. It's wrong and instead of being ashamed she just gets herself on a roll (from what it sounds like to me from your posts) and is displacing her own self image onto you. What she said about wishing you had died and your sister had lived was just uncalled for. You deserve better then this. I would definitely let the state intervene and take over, to heck with what she wants, she's not in her right mind if she's talking about driving, she could kill someone or herself if she's driving. I would definitely hide the keys, and try to turn a deaf ear to the mean stuff she keeps saying.

You don't deserve to be abused emotionally like this. I agree with bizi, if it degenerates into an assault do NOT just let it go by, I would call the police and see what they can do, tell them about the situation and pray that they will act and DO something. She sounds like she is suffering dementia (spelt wrong I bet) and needs institutionalized ASAP. You WILL get through this Nikko, hang in there...We're here for you in the meantime...