my girlfriend has a high school girl sister. one day, when i went to her house to play, even though her older sister was nearby, i was approached by my sister, who whispered lewd words in my ear while my dick was being teased until i was about to cum. taking advantage of the fact that my older sister was sleeping or while she was in the bath, i forcibly had creampie sex with my sister. i feel guilty, but i couldn't stand it because my sister is too much of a little devil...
