My girlfriend and I have a 6 year old, a two year old, and one year olds. The six-year-old was from a previous relationship and the other two are from when we were together. We have been together for 4 years and my girlfriend constantly makes excuses for the six-year-olds Behavior. I'm an only child so I have no idea how siblings are supposed to get along and get that threw in my face quite frequently. But I don't feel like a six-year-old boy who weighs 70 lb should be punching a 26-pound little girl who is 2 in the face. But I'm told that this is normal sibling Behavior. No matter what the situation does there's an excuse made for it. Today he got bit by the two year old because he was asked to clean the room and instead of picking up the toys on the floor he grabbed the toys out of her hand and said he was putting them away and although I understand that biting is wrong he did not get in trouble at all and she got in a lot of trouble. Everything he does wrong has an excuse because he went through a traumatic. Before we were together I feel like it's making an excuse for his behavior because he was too before we were together in the last 4 years of his life he has been the little King of the house. I'm getting to the point where I hate this child. I hate that we're constantly fighting over him. I hate the way he treats the other two kids. And I hate that he gets away with everything he does. He constantly lies and steals. To the extent that I've been to his school last year probably 30 times to deal with him is behavior. He left the house one morning at 6 a.m. and it's pajamas for the bag full of toys told us he was sleepwalking and had no idea where he was going. He got picked up by the police we got investigated by CPS and found not guilty of any child abuse and the school back to sup that the kid lies and steals. I feel that if my partner does not stop making excuses for his behavior and start dealing with them head-on that we are going to have huge problems in the future or she will be dealing with them on her own because I'm about ready to leave. Anybody have any advice as to what I should do? Everything I've tried to talk to her about ends in a fight.