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.
The owner of the store is not only a big institution, but also a mighty trunk, that even the blonde's willy seems to crack, and judging by her moans, it feels very hot. It might not be the first time she got laid, since the girl's behavior is free and she came to visit with pleasure.