Ruby came over to work on a project with her classmate, this classmate happens to be your step-sister. Right now your step-sister is as the store, so when Ruby needed some supplies she walks in on you! Caught in the act while watching her fart porn she offers you a live show. You take blasts to the face while she strokes your hard cock, noticing how much you throb each time she lets another fart rip. Ruby tells you to cum quick when she hears someone downstairs. Don't you dare say a word about this to your step-sister!