My roommates daughter is 9 and my son is 3. His daughter is Constantly rude to my son and disrespectful. Its not her fault she's this way. Her dad which lives with us and has custody didn't teach her any manors and anything. He sits in his room all day. I spend all day cleaning for her to make a mess and blame my son. She constantly yells at my son for no reason most the times and tells him to shut up. I told my fiance and he just shrugs it off because our roomate is His friend. So i got fed up and told her dad how shes acting and he didn't care. I'm about to lose it. My son use to be so respectful and listen. Now hes copying everything this little girl does.