In 1975 or'76 me my wife had two very close friends, my best buddy from high school & his wife.
We often spent weekends at each others houses partying w/ coke smoke & beer. One weekend at my buddy's house me and my buddy went to take care of some drug buisness. When we got back to his house the girl's had taken showers and were sitting around in bathrobes. His wife was always an exhibitionist. Her and I got into a game of Backgammon. Her on the sofa & me on the floor. I kept losing chips & with every loss when she collected her chips her robe fell open a little more. My wife commented on how I should pay more attention to the game, then it happened, she bent forward to pick up my lost chips, her robe fell open while her leges were spread and I got a FULL view of her pussy. I know she meant it to happen that way. Not sure what my wife was thinking at the time other than she knew I was getting an eyefull. After the game was over she said, well I'm going to get dressed now. A few times we were together alone while she was in her robe & we would smoke joints & read Penthouse. She would alway's act like her robe came undone by accident. I tried a few times to seduce her but she alway's said no. I think she was just an exhibitionist who liked men looking. I'd still fuck her 40 yrs. later