Parent getting in the way. Help!?

just ask the mother one day if you can sit down and talk to her alone. tell her that you feel like you're being treated unfairly because of your age, and ask her to honestly answer if there are anyother reasons she doesn't want you around her daughter... also, if she is just worried about her "little girl" try your best to reure her that she knows you, and you can be trusted... good luck :)