It took several years of talk and encouragement befroe my wife gave it a shot. She is very jealous and her main concern was that she did not want me to play with other women. She didn't understand why I would let her play and not expect the same in return. However, she is much younger than me and has a very high sex drive. We finally came to an agreement that she could play with others and I would remain faithful as long as I got the sex I needed. She has always made sure to take care of me after playing outside of our marriage.
There have been a couple of times where I have been there while she played and participated. Most of her play time is one on one with her friends. I have only met a couple of her lovers. Ironically, her first successful encounter was with a mutual friend. He was originally her friend, but we became friends as I mentored him career wise. One night, they went out for drinks and she seduce do him. It was super hot and even though he knew I was fine with her playing, he still didn't want me to know out of fear it would affect my mentoring of him. In the end, he never found out that I knew and my career advice was spot on and he was able to get a better job in another town several hours away. I think they still talk, but it was one and done with him.
For now, COVID has really slowed down her play. It has been months since she has had another cock to play with. Hoping for better next year!