How do you handle a step daughter that lies right to your face when you watched the whole scenario and then you question her on it and she says oh I didn't do that, and she lies to her dad and I have to stay out of it. I am not allowed to discipline which she needs desperatly. her dad states that everyone lies, well I disagree, sure people tell little white lies but that doesn't hurt anyone, but step daughter lies and it affects a lot of people around her and she doesn't have a care in the world. it has practically distroyed boyfrioend and my relationship, we are hangiung in there.