The brother, who had been taking secret photos of his sister's glamorous, ripe body, could no longer suppress his desire and finally attacked her in the bathroom. "You know, I masturbated to your body every night." The body of the sister, who had matured as a woman, climaxed over and over again on her brother's cock without even realizing it, and accepted a large amount of semen in her uterus, knowing the risk of pregnancy.