A young girl polished a huge bolt with her lips in the first person and fucked a guy

Im a top student in college, and if someone teases me as a nerd, they are. But successful knowledge of academic disciplines really helps me to fuck. Only not with textbooks, but with quite real girls. This is how my half-sister clocks in at school and spends all the time playing computer games and tasting beer. But she asks me to do the lessons, and if a couple of times I fucked my sister for the work done, then recently it became a habit for me and her ... And yesterday two more neighbors asked me to do their homework for them ...