Helpnewc, you might find it helpful to have things you say in your mind each time, repeating it when she rewrites history, blames you, or projects on to you. Just some simple ones that you say as mantras to yourself.
That's not my reality.
I don't own that.
I know that isn't true.
Or if you find the flip side of saying the same things more helpful:
My reality is different.
I am a good, decent person.
My truth is different.