I record my girlfriend while she gives me a blowjob

This guy loves getting oral sex and his girlfriend is a specialist in it. They have several months together and the girl is always watching pornography to learn new oral sex techniques and satisfy her boyfriend as she loves it so much. The boyfriend's friends don't believe his girlfriend is such an expert at sucking cock and ask him to show them a video of his girl's techniques. The boy manages to convince his girlfriend to let him film it and the girl shows off, puts the whole penis in her mouth and with her tongue she sucks it up and down, rubs it gently with her teeth and makes it ejaculate with a sharp and enveloping movement of her lips.