I must add Megan , that I agree with Gina's Ark and other's who have said to you to let your father help, if you cannot deal with this situation and it appears you cannot, please engage your father's support and help,he sounds a really good guy and I am sure when he understands how much this is hurting you, he will step in and help you put a stop to it for good, even if he does help you, I still think the initial NO has to come from you, so your mother knows you mean business, maybe you would risk getting a slapping, but i doubt whether your mother would do that in public either.