The brother made a joke, and the sister took offense at a completely innocent joke. And got kicked in the balls. At least their mother was the right one - she put her daughter in her place. That's right, let her kneel and suck it - she realized how wrong she was. Well, when the boy started pulling her up on his cunt like a whore, the mother realized that her educational task was done. Now there was one more bitch in the house.
It's nice to watch father and daughter exchanging mutual caresses. After that, the daughter is forever working with her daddy's company.