Well, I do know from the few fights we've had before, if I don't seem like I'm willing to play along,she'll turn negative to try and pull me in that way. I'm assuming she's feeling guilty or bad about something, hence the reason why she's trying to stir something up.
They get good at it, their brain makes it real. Its all due to her reationalizing the crap she's doing, and obviously you are to blame. Its convenient. I guess I'm starting to see what the others are saying. She's going to do some crap for a while, but do you have to enable it? Its the same question I need to ask myself.