Mary and I were best friends and when she got a great grade on her final, things just kind of happened. Before I knew it, we were kissing and then we were doing a whole lot more. Neither of us had ever been with a girl but that didn't cause any problems at all. It was the most erotic experience of my life. Until...until my boyfriend showed up and joined in! Suddenly, things were crazy and watching Mary have rough sex and then having it myself...whew!