Scarlett Marx fucking in the desk with her big ass

As the lesson comes to a finish, Professor Lawrence gives his pupils one last assignment for extra credit before dismissing them. Then the lustful little bastard opens his desk drawer, pulls out a porn magazine, and begins to get excited! However, Scarlett, his pupil, discovers him when she visits him regarding the extra credit task. The excellent professor becomes flustered and is at a loss for words, but Scarlett is game. She chooses to strip and play the classic "I-won't-tell-on-you-for-looking-at-porn-mags-if-I-fuck-you-right-here-and-you-give-me-an-A-in-class" trick on him. Do you think it will work?