The math teacher diligently explained the topic to her students in class, but the students never imagined that a black vibrator was inser...

The math teacher diligently explained the topic to her students in class, but the students never imagined that a black vibrator was inserted into her vagina. Whenever the teacher explained the topic or reprimanded disobedient students, the top male student would remotely control the vibrator, causing the originally stern teacher to instantly clench her legs, gush with vaginal fluid, and finally even ejaculate on the podium.