Make it or break it

My best friend owns a business and a girl my boyfriend works with went In For an interview at her store I don't like the girl my man works with cuz I heard she gets around well my bestie told her what I said and she came out and said this "Thom said that she wants a baby and there's no way in hell he's going to have a baby with her he said he loves her two boys but she needs to work more and take care of her kids she has now he said (we have been trying for over a month now to get pregnant because he said he want his own child) she told my friend some very personal stuff he had told her that only me and him know about an he also tells her stuff about my kids when I asked him about it he told me she's lieing and he's not going to deal with my bull shit drama how should I handle this?