One night, my friend's girlfriend stayed over at my place. Even while drunk, they started making out right in front of me. I couldn't help but get excited seeing her accidental panty shots. As I spied on them in the bath, I discovered her giving a blowjob. When she realized I was watching, she teased me by flashing her cleavage and panties, saying, "I got so excited knowing you were watching." She wanted to enjoy the thrill of cheating on her boyfriend while he slept nearby. My cock had already reached its limit. She climbed on top of me, and right before my friend's eyes, we lost control—there was no turning back.