Brother caught his sister jacking her twat and made her gargle a yam-sized man rod

My brother was sitting in his room reading a book when suddenly he heard a woman moaning. He wondered what it was, and when he went to his sister, he found her masturbating her pussy. His sister was afraid that his brother would tell his parents, and to convince him not to do it, she not only sucked his fat dick, but also let herself be fucked in her cunt without a rubber band.