This is episode 22 of 30 of The Mother-in-Law's Gift. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The closing stretch of the season, where the arc pays off.
Retired tycoon Lin Wanqing is mistaken for her son Gu Changxuan's mistress by his fiancée, Su Yue, who publicly beats and humiliates her. At the wedding, Lin reveals herself as his mother, cancels the engagement, and tears up Su Yue's share agreement, leaving her with nothing.