One of my closest friends has been dating a man who has a young daughter. They've been together for the past year or so. Long story short, she found out that he cheated on her multiple times with his ex wife, the daughter's BioMom. Apparently this happened at the beginning of their relationship. BM sent my friend a nasty, threatening message on Facebook after the BF refused to get back together with her. She got her revenge after being rejected by basically exposing him to my friend.