For better or worse, my sister, who is easy on my younger brother, is enthusiastic about my private tutoring because I am not able to study. They say things like, "I'll do anything if I get a perfect score," so I tried my best to study... and I've been able to become my own reverse bunny guy! She had no choice but to start serving her, acting unpleasantly, but when she straddles her dick and orders her to have sex, she sways her hips and cums all the time! Gradually, her face melts as she gradually becomes obedient... and actively gives blowjobs and titjobs! Completed training to my liking! During the last three days when my parents were away, I've been cumming inside my assault-like sister bunny over and over again!
