I'm looking for a story I've lost track of and I'm hoping this forum can help.
It's about a man whose wife is friends with a group who are swingers. She knows the group because the wives in the group are her best friends. One of the couples moves in next door, and they get her to join the swinging. The story is about the wife trying to get the husband to join in. In one scene, the girls try to entice him while he is sitting on his back porch, but he won't have it. He gets up and, while he is leaving, he hears his wife say something like "well that went well. Anyone else have any bright ideas?" He thinks she is cheating and hires a private investigator. In the final scene, he finds out the group is having a party next door so he and the PI and a police detective crash the party, taking video, and confronting the wife.