You're assuming he's a Cuckold, maybe he doesn't want to be involved in the fun ,maybe he knows she would shut it down if she discovered he knew.
I'm sure he's completely secure about her commitment to him.
Maybe he doesn't want her to know about his discovery, maybe he's just thrilled by the knowledge she is getting the ...... fucked out of her on a regular basis.
Wonderful post and indeed thread, I can especially identify with your first paragraph,I just want her to go out and enjoy herself to the max and not be inhibited by my presence which she surely would be.
Looikng forward to the rest of your adventure.