Several years ago, we were at a swinger campground for a weekend, and my wife instantly became friends with another lady who was also camping for the weekend with her husband. That night they dressed together and hung out at the club, dancing and kissing a little on the stripper pole.
After the party, my wife invited the couple back to our RV, and the girls talked and drank. The other lady's husband was quiet and did not talk much. He just watched. Finally, the guy asked if the girls were going to play. The two girls began to kiss, wearing only their panties, and it quickly became passionate. When they paused, the other husband said their rules did not allow his wife to be with another man, but they played with other women together. He looked over at me and said I could watch if I wanted but could not join in, even with my own wife, while they played. I wanted my wife to enjoy herself, so I agreed.
It was hot to watch my wife suck the guy's cock with the other woman and kiss the other girl while her husband was fucking my wife. The girls ate each other's pussy, and the husband emptied his balls inside my wife.
After they left that night, we never saw them again. The next morning their RV was already gone from the park.