I am currently engaged to a man who has two children. His daughter is 18 and his son is 15. I don't even know where to begin but am glad that I can vent about this. My fiancée and I dated for a while and lived separately. His children are such problem children. I have twins that are 15. Where to begin where to begin. His daughter dropped out of high school and is engaged to guy that is 22 and lives with her fiancée's grandparents.