RCT-604 Mothers preparing for entrance exams love managing their sons' ejaculations

To improve exam scores, the mother took on managing her son's ejaculations! Until the day of the exam, Mom would jerk him off and give head, sticking a sticker on the calendar for each daily release. A reward blowjob from a young, cute tutor… As punishment for ejaculating with someone other than Mom, chastity belt discipline! Gradually, Mom also started to crave it and couldn't hold back, leading to incest, and five consecutive rounds of sex on the eve of the exam!