Zebra,
I have been following your story from your first posts. You have made great progress. I hope that it will be soon that you can "ask for what you want" - I am sure the C is leading you that way.
It does surprise me that the C has not mentioned that it is critical for OM to be completely out of the picture. None of her contact with him is necessary.
Can you bring it up at C or by phone to C? This will be a sign of commitment to M and remove OP from the shadows, etc.
The C should take the heat on this issue - not you.
You mentioned when you started out - you both hung out with a group of friends - you 2 were part of same circle of friends. Time to get a new common circle of friends (w/pro-marriage lifestyle). I remember awhile back your W stopped hanging with "the sisterhood" ...W was starting to hang with more "respectable" gals, where does that stand now?
...about your last post ...
"wow, you 2 are falling in love again" LSL