I'm happy the party went off w/o a hitch. Sounds like everyone had a good time and I very happy your h acted better than last year.
About your thoughts...I think your h will be the one to confess because he's the one that is carrying the guilt. I'm now beginning to think that the "itch" he's having right now is triggered by his guilt, not his usual health issue.
As far as the ow, she did her fishing and she went home empty handed. I'm sure she told him about the conversation as well and is now starting to pressure him a bit, just knowing that you are still playing the hand of cards that you've been dealt. Don't tip your hand. Sit quietly, the answers will come very soon.
Enjoy your day!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.