INAPPROPRIATE SHARING OF INFORMATION WITH OPPOSITE SEX. Red flags all over the place. New woman at work and they're already talking about their "past" relationships? Your man needs to learn boundaries; he doesn't have any.
That stuff should be between YOU and him, an IC and him, or another man and him. That's all.
Forget the former things; do not dwell on the past. See, I am doing a new thing! Is 43:18-19
If it seems slow in coming, wait. It's on its way. It will come right on time. Hab 2:3