My friend is a total ess-hole please read this?

a so-called friend of mine was out to dinner with my mother and her friend donna, who happens to be my friends aunt. my mother is barely a year out of 2 re-hab's for prescription drugs and my friend go's and smokes 2 joints in my mother's presence not to mention one time was in the car with my mother. now my mother is doing great. just got her RN's license back and is back on track, but now my ex-friend is talking all kinds of crap on me saying i am ridiculous and totally over-reacting over this situation because i went off on her. wtf? don't i have the right to be completely out-raged ?