They didn’t know I was watching them out in the middle of the dance floor. I had wandered off and left her sitting on a bench and she was gone when I returned some 20 minutes later. I was stunned to see them share a long kiss and him pulling her tight against him and as they continued to dance it dawned on me that I should be as friendly as possible when they came walking towards me when the song was over. I wanted him to know I wasn’t threatened nor should he be. We ended up all going dancing together three weeks later and got along quite well. I gave them both thumbs up to date without me and a few dates in they became lovers. We all remain good friends and understand each other. It works!