Maybe he is trying to make you jealous by talking about her. Are you sure he was flirting with you? Maybe he's just a really outgoing person. I am, and for the longest time, this guy I used to work with thought I really liked him. I did, but in a totally platonic sort of way. If it really bothers you, just come out and ask him. Are you guys sleeping together? If so, maybe he thinks it is understood that it is casual sex and doesn't understand why it bothers you. I would just ask him. Maybe there is a simple explanation. Also, is he talking about his kids when he mentions his wife? Maybe he thinks people might overhear you talking and he wants it to sound like he treats you like everyone else. I'm not sure about that one, I need more info!
