The math teacher diligently explains the subject to the students in class, but the students never thought that there was a black vibrator...

The math teacher diligently explains the subject to the students in class, but the students never thought that there was a black vibrator in the teacher's pussy. Whenever the teacher explains the subject or scolds the disobedient students, the big brother always remotely controls the vibrator in time to make the originally strict teacher instantly clamp her legs together, her pussy juice flows, and finally she even squirts on the podium.