I have a threesome with my best friend and her girlfriend! I loved how she fucks

My best friend and I had talked about fantasies on wine nights, about sharing, about testing boundaries together. Today she invited me to her house, greeted me with a mischievous smile, and when her boyfriend came out of the shower with only a towel, I knew the night had come. We both started, kissing slowly while he watched, then she guided me to her cock, huge, hard, ready to be shared. I sucked her with her watching, I rode with her cheering, and when she exploded on my tits, she smiled and said she was the best friend in the world.