Is your mother paying for your college? Legally your mother doesn't have to pay for you to go to college, so if you sue her don't you think that would upset her and she would stop paying your tuition if she is paying it? A lot of parents charge their children rent once they have turned 18 and are still living at home. If you don't want to pay the rent to her you then have to look for another place to live and pay rent anyway. If your college has dorms you may want to look into how much that would cost and whether or not you could do that.