Pornwalai, Yodtian's sister, is Prakob's mistress. He devoted his money and himself to her, but she already had another man. When Prakob finds out, he dies of a heart attack and leaves a lots of his assets to Pornwalai, which results in his son Nopparuj being furious at both her and Yodtian. Nopparuj chases after them to get revenge and Yodtian lets him do whatever he wants because she feels guilty over her sister's actions.—Vorachote Sakulsri