Hi Stephyp - This situation that you described sounds painful. And it is understandable that you would feel that you have been treated unfairly. You do not deserve to have been assaulted. Did you have any reason to anticipate that your sister would respond by placing her hands around your neck? This was her reaction to whatever you had said, and she is responsible for her behaviour. You are not responsible for her behaviour. But, with your awareness now that this is her response, then my advice would be to keep distance from her, and avoid confrontations with her, for your safety. It may be that she has other life issues (as you mentioned her pain), and you've described her aggressiveness and intimidation. Have either of you considered going for personal therapy, or even family therapy? It is such a shame when family members treat someone badly. Is there a way to improve her behaviour? How to arrange for future family occasions to be peaceful and safe? It seems to me that everyone involved needs to be part of the solution.