hey,
tough problem, but its not your fault. I'd say keep on being nice to your friends mom. eventually (and this might happen really slowly) she will come to realize that you are not a bad person and that you really do care about your friend.
You are entitled to your own opinions, and they dont have to be the same as your friends mom.
Try and keep in touch with your friend, and be there for her if she needs you. hope i helped
