Scarlett Marx fucking in the desk with her big ass

It's the end of class, and Professor Lawrence offers his students an extra credit assignment before dismissing them. The horny little bastard then pulls a porn mag out of his desk drawer and starts getting his jollies! But his student Scarlett catches him when she approaches him about the extra credit assignment. Flustered, the good professor doesn't know what to say, but Scarlett's turned on: she decides to undress and pull the ol' "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. Think it'll work?