My fiancé and I have been together for almost 2 years, he has full custody of his son who is 10 and daughter who is 8. I have a son who is 8. When we first started dating my fiancé's son was very jealous of my son, because my sons dad and grandmother would buy him things and take him places. It got to the point that my fiancé's son would do sneaky things to my son or put him down. I told my fiancé that he needed to talk to his son about his behavior, he did, but it continued. I finally got fed up and talked to my SS myself.