yeah she beats me, and has for a while, and never remembers, this past monday she hit me in the head and as a reflex I hit her back. She always hits me out of anger.
I'm sorry, Feanor.
How often does this happen? Apparently she has anger issues. Is she doing something about them? Therapy, medication?
If she feels sorry about it, maybe you can talk about what she can do to control herself? That is, if you think it's worth the bother.
People can change for the better, but only if they want to.
Edit: This is not meant to downplay violence. It has to be clear that it's a no-go; that's the only basis for improvement.