What is the meanest way to tell someone you hate them?

My aunt threatens me and says horrible things to me a lot and I just want to do something to hurt her (NOT physically) ... something that will make her rethink what she has done to me and my family (she is an alcoholic *****) she has almost killed my grandmother (my grandmother is in the ICU bc of stress) by verbally hurting her so much ..... SO any help? What is the MEANEST thing I can do just to make her feel HORRIBLE!