When Sandra walks inside of her professor's office to see what she can do about passing the class she is failing and her professor asks if she's willing to get down on her knees to earn a passing grade things don't go as the professor had planned. She flips the script on him because we all know Sandra only gets down on her knees for guys with big dicks and built bodies. She turns her professor into her submissive ass worshipper-cleaner and he is the one that ends up on his knees cleaning up and worshipping Sandra's ass. She even turns him into a cuckold when she tells him that from now on she will visit his office every Friday night for an ass licking session before she heads out to find a nice big dick to fuck. Oh. And of course she passed the class, Sandra always gets her way.