My 14 year old daughter is a little bitch.she's constantly lying,speaks to me like dirt and generally behaves in an unacceptable way.Recently we ended up in a tussel and she said i am mental,not good enough for her father and not good enough to be her mother.I'm at the end of my tether.She's determined to be hateful to me to the point of telling major lies about my mental health(of which there is no problem!).It is very serious and i have no idea how to react.Any advice so gratefully received.