About 25 years ago, my ex and I had a full day of public action. It started out with myself, her and a friend of ours going to the beach. We always went to the far end where nudity was allowed, but our friend didn't know this.
We had played strip poker with him and his ex-wife before but had never been in a public situation with him and this was his first time alone with us since his divorce.
We had a cooler full of beer and my ex and I had already planned on us getting naked but we wanted to wait till our friend's inhibitions were let down some. We started playing with a Frisbee Keep Away and as planned, I "accidentally" grabbed onto the back of my ex's bathing suit top and it ended up in my hand. Her nice 34C's came jiggling on out and she stayed topless for the rest of the game.
After that, we went for a swim and when we came out of the water, she wanted suntan oil put on her. I made an excuse of having to go back into the water which left our friend to put the suntan oil on her. She told him she was thinking of getting an all over tan, so off came the bottoms too. He got all nervous as I came up from the water and I told him to go ahead, finish putting the oil on her. After she was totally naked, the two of us got naked and had her put the suntan oil on us.
It was the first time I had ever seen her touch another man's dick and he shot his wad with the first stroke of her hand with the warm suntan oil on it. Then it was my turned to get oiled and I don't think I did much better.
After we left the beach, we went to his apartment to shower up and get ready for a night on the town. As soon as we walked into his apartment, my wife shed her clothes again and asked for a towel. We followed suit and the three of us ended up in the shower together. He washed her front as I washed her back, then she washed him as I watched. It was exciting watching her stroke his dick while she was washing him. I tried to get her to go down on him, but she wouldn't.