Father lost his daughter in cards to his brother

Two brothers played cards and one lost to another absolutely everything that he had even a house and his own business. And then his brother suggested putting everything lost in sex with his daughter, that is, his niece. Father so wanted to play everything that he agreed, and lost again. Then his uncle went to the bedroom to his niece and told her everything and explained that she was obliged to fulfill the card debt of her father and sleep with him.