Self Defense and Assault charge
I live in NJ, I am going to be placed into a possible hostile environment tonight as I am helping my girlfriend move her stuff out of her ex in laws. Her exes step father has quite a temper along with his wife. They want to try and talk to her and possibly stay, but their idea of talking is telling her how horrible she is for doing this to her son and that she is a horrible mother. They do know that I am coming tonight to help her move but I told her the first sign that things get heated or their attempt to belittle her that the discussion is over and we are leaving.
My question is, if this guy does try to grab my arm if we decide to leave what can I do about it? I have read conflicting arguments that I can protect myself so I do not feel threatened and others say that it's assault.