I was frustrated that my girlfriend still wouldn't let me fuck her bareback. I'd fantasized about finally getting to creampie her, when her big-titted older sister started pressing her soft breasts against me and tempting me with an offer to let me creampie her. I love my girlfriend, but I couldn't resist the temptation. While passionately groping her pillowy tits, I kept fucking her older sister over and over—until my girlfriend caught us. But I was feeling too good to stop, and ended up shooting a massive creampie deep inside her sister's pussy.