I went to my friend's house one night for dinner. We sat around talking and had a few drinks. My friend's wife wanted to know if I wanted to watch a movie. Since they were horror fans, I thought nothing of it when the movie came on. It started off like a B-rated film, but turned out to be a porno. I turned to them thinking that they would be embarrassed, but to my amazement my friend's wife was getting undressed. Before I knew what was going on, we were into my first threesome. I have visited many more times, and it always ends up the same way. Thanks for best friends.