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.
Such a little girl is a sin not to spank, which daddy did. The ass certainly turned pretty red at the end.