Oh I'm sorry. That is really hard. My best guess would be that you keep setting yourself up because she is still your mother, regardless of everything else. You can't help but control the urge to be in her life, because you are her child. I would love to give you some speech about dumping her, and how dare she stay married to the monster that molested you, etc. But... the bottom line is that is up to you to decide. It is up to you to decide if it is ok with you or not. But, at the end of the the day, she's still your mother, and no one can fault you for having trouble disconnecting from her.

The best advice I can give is to hang in there and know that someone is empathetic to your situation.