Fucked by surprise with her sister and best friend

Your sister wants to make you the best birthday gift you can imagine. To surprise him, he convinced his best friend to let his 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 his sister's best friend, but what he does not expect is that his sister will start masturbating watching as he fucks her and that in the end he decides to join in also telling his brother that he wants to try his stick