Two of the wife's guy friends, that she went to school/grew up with, know about it. They both live in different states, and will randomly stop by for a "visit" when they're in town visiting family.
Wife's nieces know because wife openly admits it and proudly so. Now, a friend of our adult children also knows because I havebeen sharing her pics with him. I caught on that he is attracted to my wife and thus I share.