Unfortunately, you can't "make" her change. I won't as, as I know sessions are private, but perhaps finding out why she keeps getting into these abusive relationships in the first place.
I don't mean this next to be sexist, but guys rarely talk about being abused even if they are. There seems to be a return to another abusive relationship for some women who seem like they have so much going for them. Smart, attractive, driven, yet in their personal relationships, can't seem to stop the cycle.
Just a guess, but I would bet that she doesn't feel that good about herself. Maybe she was abused as a child, or somewhere along the line she didn't fit in and didn't want to lose the abusive man or woman. Most of us would get angry and not let someone walk all over us much less verbally or physically abuse us. (Again, this is from a male point of view so I'm sure there are things I've missed).
One of my Aunts started out with an abusive husband, and though she divorced him, continued to move from bad to worse. She finally found someone who treats her well in her late 60's. She too is smart, witty attractive and you would never guess that every relationship over the past few decades was either physically, emotionally (or both) abusive.
Until you find what caused her to feel poorly of herself or to think she didn't deserve any better, you will have made a major breakthrough.