Kotono, my girlfriend's best friend, is infamous for sleeping around. One day her aggressive advances got the better of me and I let her suck my cock. I felt guilty for betraying my girlfriend, but it felt incredible. When my girlfriend went home to visit her family, Kotono struck again, riding me with relentless pile-driver strokes as if she would never let me escape. But my stamina is just as extreme: even after repeatedly filling her with cum, my cock stays hard and keeps shooting.