My stepson (8 years old) stays with us on weekends for two days, and the rest of the time he's with his mom. Couple times a year we take him with us to long vacations. I have a two year old son and am pregnant with my second son.  My toddler thinks he needs to copy his older brother in every little thing. My step son became very disrespectful towards me (only) for the last 2-3 years. I've known him since he was 4 y.o. I've been told by my husband and my mother-in-law that his mom is most likely putting him against me. To be honest I don't care about why he started showing attitude towards me, all I care is somehow I need to make it clear you don't behave like that in my house. I'm not talking about saying "thanks" when I buy him clothes or cook his fav food. Or when I try to give him a hug, he screams.  I'm talking about "everybody is ok, except you" attitude.  Things like "I don't like you", "becoz of you, I lost my game" etc. Back talking to me like I'm his younger sis. Disregarding or plain ignoring when I tell him to pick up his clothes from the floor or any simple things like that. I close my eyes towards how he is with his step brother: he does anything and everything to get him into trouble, he takes away his toys, pushes him, when my toddler falls and hurts himself he laughs out loud. It's not just my son he can't get along with. He can't get along with basically any kid. Daycares, schools have called my husband and his mom about his misbehavior and attitude towards other kids since he was 3 3 y.o. His mom and dad got divorced when he was 3-4 months old infant, so he grew up living in two separate houses. He has his own room, with everything an 8 year old needs. When it comes to chores, I don't ask him to help. I clean his room, his bathroom, do his laundry, clean up after him. All I ask is that he takes his empty plate to kitchen sink, and picks up his clothes from the floor after changing.