The redhead might as well come to work completely naked - neither the skirt nor the blouse of her charms do not even try to hide it. So it's no wonder that the young boss ended up sticking his dick in her cheek. Who would resist, seeing those breasts and ass in almost open access every day? I don't even know of any men like that, and I don't know of any women who like it either!
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.
How all the girls love young tutors, they apparently drool at the sight of these men with pumped arms, so they give him all the passion, in principle, not surprised.