Keep up with the changes. Working with him will give him a chance to see them close at hand.
Also, he knows that you want some sort of MC before D and I would stick to that if things are raised again. I wouldn't bring it up yourself unless he mentions D and it being too late and then I would talk about something like Retrouvaille and how it might help bring clarity/closure to the sitch. He needn't know you know about the A.
However, you may find you reach a point when the A is outed at work by someone else and then you will may be have to re think things.
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength