My Stepsister, My Strongest Ally - Episode 6

After a switched-at-birth reveal, Mason suddenly confesses he's liked Rudy since they were kids, but Rudy and other relatives accuse him of pranks and doubt his sincerity. The family argues over Rudy's status—no longer heiress but still 'our daughter' and 'forever my sister'—and one relative threatens to tell their grandfather unless they produce proof. Someone answers by producing a tape as 'solid' evidence. Mason stays to check on Rudy and vows he'll wait through any engagement, marriage, or widowhood. Rudy bolts; as Zane rushes after her shouting 'Hey, wait up!', the tape’s meaning and Rudy’s choice remain unresolved.