Double head Stories

As I told you in my last story, Maria and I were now good friends with Glen and Robin. We had a threesome with Glen; now I couldn't wait for more fun. We had talked about the possibility of the four of us getting together. We also talked about "trading" Robin and Maria. Both Glen and I wanted to have a threesome with Robin and Maria. The big swinger fantasy. A FMF 3sum! We decided that Maria would go out and visit them if...