Russian girl on the couch gives a blowjob and cums on her friends dick

A college student has a specific math problem and gets a B on her test. An excellent student - a classmate who has everything in order with his studies toil with nedotrakh and is ready to pull up the girl on the mat for a banal blowjob. The girl agrees, but during sex she gets so turned on that she fucks in pussy ... It looks like soon she herself will run to him to fuck and without any mathematics.