When I visit my girlfriend's house, I always get seduced by her older sister, who is the complete opposite of my childish girlfriend—mature, sexy, and well-endowed. I love my girlfriend, but I can't resist this older woman's advances. While my girlfriend only allows sex with condoms, her sister permits bareback sex and creampie. Even with my girlfriend nearby, I can't resist the sensation of being inside her sister without protection. The pleasure is so intense that I can't stop thrusting, and I'm addicted to this forbidden relationship. I'm afraid of getting caught, but I can't resist the thrill.