Today, I invited a friend over to the apartment where I live with my girlfriend, and the three of us had a fun drinking party. After falling asleep in the room, I was suddenly awakened by a strange noise. Opening my eyes slightly, I saw my girlfriend starting to masturbate right in front of my sleeping friend. When my friend woke up, he looked confused at first, but after exchanging deep, passionate kisses, he pulled down his pants and began giving her a blowjob and titty fuck. For some reason, instead of stopping them, I could only silently watch the scene unfold. As the two of them grew more intense, my own crotch swelled with arousal...