Professor D isn't quite sure what to do with Barbie Sins. She's got the highest average in the class, but she keeps insisting on hanging around trying to get some extra credit. When Professor D breaks the news that her grades can't get any higher, she decides to show him some of her other skills - like how she can fit her prof's meat ruler down her throat. After pounding her pussy deep, Professor D may not be able to give her extra credit, but she's at least earned his massive load all over her face!