My Daughter, Love and Forgive Me Once More — Episode 13

The protagonist's husband still clings to his first love and forbids his daughter Aria from calling him "Daddy." He ignores Aria's birthday to propose to his ex-girlfriend. During a school recital, the mistress and her daughter feed Aria a strawberry cake she is allergic to, putting her life in danger, yet the husband still shields the culprits. Deciding to get a divorce, the wife reveals her true identity as a Duke's daughter. Fighting as a mother for her child, even when her husband begs on his knees at the end, Aria never calls him father again.