I cant cope with my nearly 15 year olds behaviour, she is currently grounded for lying to us in the Feb half term holiday saying she was going shopping with her friend only to go and meet a boy. I dont mind that she was going to meet a boy its the lying, then last night cos i wouldnt let her go out she told me to fuck off and that she hates me and doesnt want anything to do with me and cant wait to leave home so she doesnt have to see us ever again!! she is driving me to a nervous breakdown. Her mouth is vile