So they will say anything to anyone to convince themselves that they are doing the right thing. So, she will be mean, angry, vindictive, cold, etc to prove to herself that its YOU who is the problem.
This doesn't only apply to her support system, but also directly at you. If you fight back, or defend yourself against these attacks, you're only further re-enforcing her ideas that your the mean, vindictive, controlling, cold man that she has set you out to be. I made this mistake several times. It's hard, but the right thing to do is NOT get lured in by her bait.