<human>: When my parents got divorced 5 or so years ago I took it pretty rough. It changed me as a person dealing with the divorce and I had a few years of pretty rough depression. 

As i started to get past my issues, essentially my mother starts to go crazy. She starts talking about how she wishes she could kill my father (whom I live with) and she even goes as far as making credible threats to him. I speculated that she has some form of Bipolar disorder, and that in general she acts like a pissed off child. My dad alerted his lawyer about the threats (and a few other people) and eventually the threats stopped (as far as I know). 

I stopped talking to her partly because I was developing some anxiety issues over the fact that she might get her boyfriend or someone to attempt to kill my dad. There are a few other reasons to why I don't want a relationship with her, but that really isn't relevant right now.

I cut all ties with her, never accepting phone calls (she doesn't have my phone number or email) or responding to letters. Not talking to her was my choice and I'm not doubting if i did the right or wrong thing here. When I cut her out of my life things got drastically better. What i am asking for is help on what to do about my High school graduation in roughly 2 weeks. She is apparently going to be there and i don't want to talk or even see her. Should I be reaching out to tell her not to come? I don't understand why she can't take a hint and see that I have no interest in having anything to do with her. Help me please.

Can you condense the text into three sentences or less?
<bot>: Havent spoken to my mother in 3 years (my choice) and she is going to be coming to my graduation in 2 weeks. I dont want any interaction/ I want her to stop trying to contact me.