A few months ago a woman joined the company DP works for. He said they get on really well and that she's good fun and attractive. I was fine with this as I get on with most of my colleagues. However he has mentioned some of their conversations and they seem to be overly intimate. She confides details of her relationship with her fiance and says she's unsure about moving in with him and that he's much keener than she is. She said also she finds the sport that her fiance plays very boring. She also told DP recently that her ex (who is married!) has been back in touch with her and wants to rekindle things and she's now in a quandary as she was very keen on her ex. Personally I think she's over confiding in DP and that he should tell her this. I think her conversation signals to my DP that she's not averse to having affairs with people who are already in relationships. AIBU to tell him that he should keep conversations more neutral or am I over reacting and is it ok for her to talk to my DP about such personal stuff. So as not to drip feed, I've met her and she's very flirty around men. DP is a good looking man and we have been together nearly 12 years and have one DS. He's never previously done anything to cause me concern.