It's not even quite clear whether the brother helped his sister, pleasured her, or taught her. Either way, she should be grateful to him after a fuck like that. It's funny to see how he uses both his phallus and her toys to develop his sister's anal hole. It's bright and exciting, and you can see the details that are so valuable in a process like this. I wonder what he will turn her on with next time.
My brother's sister is such a beauty, she's got it all - her tits, her ass, and her pussy is attractive. And the ass, I can tell you, is working, since the toys even enter her hole in the summer. I think that this is not the first time the girl uses them, and guests are often there. Sister - masteress was in all plans - and sucks good, and anal mastered well. His brother can only fantasize about fucking his slutty cousin.
Well, he fucked his sister in the mouth, as it should be, and by the looks of it, it's not the first time.