Hypothetical question. You're in a club having a good time and you see the girlfriend/wife of a guy you know fairly well, he could be a co-worker (we call them work colleague), or someone you know socially. The girl you see is with other girls you don't know and she's getting some seriously hot high contact action stage side or on the floor from dancers. You're quite shocked to see her in this environment let alone enjoying herself in the way she is. Although she knows you your eyes don't meet and she is not aware of your presence throughout your stay at the club.
When you next see her guy do you say you saw her and mention what she did, or do you keep it to yourself? When you see her by herself do you mention you saw her?


It's their business, if the situation were reversed would you want to be ratted out by someone?
Privately I would be VERY jealous that he has a wife/girlfriend who is so uninhibited they would do that.