my step daughter is 13 years old but recently her behaviour has gotten bad, my partner has her every weekend & contact has been consistent for all of her life. It's got to a point now where she's being unruly, disrespectful and constantly lies. If she doesn't want to do something then she will cause an argument, walk out the house and then go to tell lies to her mother about us. Nothing can be resolved by talking to her mother has she thinks it's okay for her to behave this way. We also know that the child is having things said to them about us that shouldn't even be said or discusses with a kid. These lies are getting rather bad to, we get the small white lie then go to extremes of saying someone has hit her or saying her dad said he don't love her. We've tried talking to her and nothing good ever comes from it. What more can be done? We're at pur witts end. P.S she's good at school just home work that normally fails to be submitted