Good for you. I'm actually in the same boat as you, my WH is the supervisor of the OW. I hate that he has to see her, that she has to report to them, that there has to be contact. I want out of sight, out of mind.
I hope I can eventually find your strength so I can move on, too. My WH says I think about OW more than he does and I "make" her an issue. I feel so on edge daily with the fact that he has to see her. :(