He spies on his little sister and she sees him jerking off before fucking him

These two brothers are equally out and the two want sex anyway. The uncle spies on his sister while he changes and looks at her ass and even touches her tits when she falls asleep. Then she spies on him while the brother is jerking. So it is normal for the two to end up fucking like vicious crazy people who just want sex, whatever it is. The sister is already very hot when she sees him jerking off, so she can't resist approaching and telling her to stop putting her dick in that plastic vagina and fuck her because she has a very wet pussy.