You are leaving out the possibility that she is being abused, at least emotionally, and, like a lot of abused women, doesn't see a way out. I thought of this because, if this is how he treated other women, I doubt very much that he treats her very well either.
That might explain her staying with him if it weren't for the other things in that story and the nature of his issues. If she was abused, she would believe that others were abused. She wouldn't be denying it and saying that she made Bill Cosby and taking affirmative steps to help him. She's certainly got problems, though, but I'm not convinced he drugged and raped her. She may just be in huge denial. And once she stuck by him her denial got even worse.