"You said you'd do whatever I said if I got a perfect score on the test!" The roles are reversed with my cheeky sister making fun of her little brother! For three days while our parents were away... I was getting horny every day at her defenseless boobs and big ass, so I planned to make her wear an obscene cosplay and make her cum with shame! But my sister was so angry at the costume that exposed her breasts that she didn't like it, so my sexual harassment training escalated! I ordered her to suck my dick and pistoned her from behind until she was happy! I made my lewd sister, who gradually became obedient, understand by cumming inside her!