My husband and I are at a loss. He has two children from his previous marriage and in the beginning there were just the normal transitional issues that you experience when you combined a family. Now for the past three months or so his oldest daughter has been doing everything in her power to always keep our home stirred up. She has been acting out twords her own sister and my daughter, she is purposely breaking rules, we have caught her numerous times stealing from us and lying about anything and everything. She will say things to strangers and to both my husband and I to try to hurt us, things have just been getting worse and worse. We have tried talking to her several times. We have tried giving her responsibilities, we have tried spending individual time with her, we spend a lot of family time together and we have been consistent and stable with our home. We don't know what to do anymore....any advice?