On vacation in the pool. We met an older couple (50) who had the suite next to us. I am 32 and my wife is 29. And at that time she was still 27. The last night after me and my wife went out and drank a lot we went to the pool in our suite. The older couple was also in the pool. His wife got tired at some point and went to sleep in her room. The husband stayed in the pool with us. Me and my wife were very drunk. After we have all talked for a long time it became quiet for a long time and we relexed. After some time we made out and I rub her pussy in the water. We didn't realize he was getting close until he started massaging her feet. Everything was so hot. When he realized that we were letting him do it, he touched her legs and pussy and caressed her face with his other hand. At some point we broke off and went without him to bed and had the best sex. It was a hot experience but never happened again. She is open but says it has to happen spontaneously like in the pool.