The Transmigrated Villainess Is Done Being a Love-Brained Fool

After transmigrating into a book as a supporting female character, she does everything she can to make the male lead, who doesn't know how beautiful his wife is, call off their engagement. But who could have guessed that she'd fall in love with him as they spend time together? Just as she's ready to join hands with him and spend their lives together, the female lead returns. Will she get entangled with the male and female leads, or cut her losses in time and choose the handsome second male lead...