Is this right? good christian?

Tell your mother that her behaviour is embarrassing you and damaging the group as a whole. You appreciate her fundraising efforts but, if she persists, you think the best thing for all concerned will be for you to withdraw from the group. Speak to the girls whose mothers have been abused by your mother and apologise to them. Tell them, also, that you are thinking that you should withdraw from the group because of your mother's behaviour.