Fucked by surprise with her sister and her best friend

Your sister wants to make you the best birthday present you can imagine. To surprise him, he has convinced his best friend to let the brother put his cock. He takes him to his room blindfolded and tells him to leave his birthday present in bed. There he discovers that he is going to fuck the best friend of the sister, but what he does not expect is that his sister starts to masturbate watching how he fucks her and that in the end he decides to join also telling the brother that he wants to try his cock .