I met my, female, partner over 2 years ago. I expressed to her when we met that I am non-monogamous. She had never been in a non-monogamous relationship before. She knew that I had a couple of other female lovers and is ok with it. She got on a popular app for non-monogamous folks and met a couple. She has played with the several times as their unicorn. She finally set up a date for the 4 of us. They came over, we had drinks, a nice dinner, then we all adjourned to the bedroom. I couldn't help feeling like they we really all about her, my partner, and I was just sort of...there. Their familiarity with each other made me a little uneasy. We did not have sex with them. But they said that they do want to get together again and play. And I know that she will see them on her own as well. They are a LS couple. My partner and I are sexplorers. I was the one who introduced non-monogamy to our relationship yet here I am the one feeling kind of off. Anyone else ever dealt with this sort of situation.