Sister and brother who grew up in a family where everything is decided through the King's Game

In our house, we have decided to do it in the King's Game every time we have a dispute with our younger sister. Fighting snacks, bath order, whether to keep a dog or a cat. That rule remains the same even now that my sister has grown up. Orders are absolute, so anything can be done. He engages in battle every day, where he immediately licks his penis, but when his younger sister wins, he gets a handjob halfway through.