Madame Ddu makes money off of love. For every match (marriage) she creates between ultra wealthy families - she gets paid $100k as a matchmaking fee. Madame Ddu united two powerful families through the marriage of their children, and she expected to be compensated for it. When the groom’s side refused to pay their share of her matchmaking fees - Madam Ddu was willing to play dirty to get them to break up. She would anonymously plant seeds within the wealthy families accusing the spouses of cheating. Mother-in-laws started believing incest was taking place. Private investigators were hired. In the end - one would die, and the others would be in jail for murder.