Your teacher notices that you always have erections when you see her big tits and your grades have dropped because of that distraction so your teacher proposes that at the end of each class you can touch those boobs that you like so much if you improves your grades. She will give you a sample of what you will get if you improve. First she masturbates you with her boobs out, then she rides him showing her boobs bouncing, dominating you saying that you are hers only hers, no woman is going to touch you again that he belongs to her.