Sister got caught while jerking off with her friend

Having decided to skip the last classes at the university today, the student could not even think what a great decision it was! After all, having returned home ahead of time, he found his sister and her friend doing a very interesting activity. The girls thought that they would definitely be home alone for another couple of hours, so they sat comfortably on the bed in the bedroom and slowly jerked off. The peeping brother, however, quickly burned out and was invited into the room. But instead of slaps, he got a threesome. Good too!