I walk in on your girlfriend, my best friend, sucking your cock. Instead of leaving, I decide to stay and watch. I've noticed how you stare at me and I know you like me. You wish you were pushing your dick past MY lips right now, don't you? That's never going to happen ... but I'm going to stay here and tease you, and when I finally let you cum in her mouth, you're going to be thinking about me.