From what I have been able to find on the Net, from friends, mental health pros and family, my STBXW bringing in a boyfriend half her age (she's 42, he's 21) to play with and bond with my 16y/o son and 5 y/o daughter is not a healthy thing. She has left the 16 y/o alone overnight with the 5 y/o to go spend the night with him after we separated, before I filed for divorce. What can I say or do to get accross to her that this is an unhealthy situation for our children without being manipulative or controlling? I haven't been perfect, I know, but this seems harmful longterm. She states clearly that it's not serious and he probably won't be around too long. My concern is them bonding with him, he leaves and they feel abandoned, less trustful of men, etc. She loves our children but seems to think my objections to her boytoy is only from anger or jealousy. While hurt deeply and very sad, my biggest concern is for the children. Any specific books or websites or objective info will be greatly appreciated. HELP!!!