Hi all! Need advice!! What used to be the sweetest kid, our 6 year old bit has been behaving badly. Single mother situation, father parents differently when has the kids. This is a middle kid. Lately he goes into fight mode all the time. Talks back. Tells mom she is mean even though she is the sweetest. Just does and says mean things to parents and other adults with no filter a lot. Recently he peed on his bedroom floor and thought it was funny. We're not sure how much of this is "normal" or a result of the divorce or what. He is not responding to punishment and/or talks. Now his younger sister is starting to repeat stuff he said like "mom you are mean", etc.... Help!!!