My 12 year old stepdaughter recently lied to us. My husband had a long conversation with her about losing trust. We also took away TV, laptop, cell phone and her cherished iPod. For one month. She also has been fighting on Facebook and using the B word. I told her for that, she will get seperate punishment from me. I had her pick up dog poop in the front yard.She felt like people would drive by and see her, But she did it without compaining much. Since being grounded, she has been in a fairly good mood and good. Nothing seems to bother her when we ground her. She says she doesnt care. So I don't know if this will stop the lying or not.