Lucky guy enjoys incest sex with his slutty younger sister

A lucky guy is enjoying incest sex with his slutty sister. A few days back he accidentally caught her fucking one of the neighbours. It was a very shocking thing for him and he was avoiding her from that day. But today they are alone and his sister came to his room and told him everything. As shocking it all was, she also admits that she is a slut and loves to fuck. But he was not going to let her fuck strangers like that, and so she asks him to fuck her. It was a very odd situating but he too is a man with needs.