I went on a double date with my best friend on a hot spring trip, but I ended up having sex with her boyfriend. I'm not really into her boyfriend, but we had great physical chemistry. To be honest, I've always been sexually frustrated and was jealous of my best friend's lovey-dovey behavior. Even though I knew it was wrong, I was so excited to do something naughty behind my best friend's boyfriend's back that I couldn't stop. Hey, this is a secret, okay?