Lake,
When dealing with my loved ones that are A's, I try really hard to think about what would I try to suggest to someone else if they came to me with the same situation - If I told you my AH was threaten to kill me, what would you suggest I do? Probably protect myself right? Please try to do the same for yourself and Mrs. Lake.
I know you love your son, but we have no way of knowing how far the disease will take them - We all have the right to live without fear and without threats of violence.
Rita