My Fiancé Became My Stepson

In Manhattan's Upper East Side, Aurora, the true heiress of the Winters family, is engaged to Julian, the son of the wealthy Ashford family. Julian promised her an unforgettable proposal on the lawn. On the day of the proposal, Aurora stands expectantly under a flower arch, but Julian walks right past her and kneels before her adoptive sister, Seraphina. Seraphina accepts in public, and the two of them humiliate Aurora, even pushing her adoptive mother, who tries to stop them, to the ground, leaving her unconscious. Seraphina triumphantly declares that she will steal everything from Aurora—her family background, status, and her position as the mistress of the Ashford family. Aurora finally realizes the truth and decides to retaliate in the most ruthless way: since her sister wants to be the mistress of the Ashford family, she will become her sister's mother-in-law.