On the March 1 airing of KBS 2TV's 'Happy Together 3', Lee Da In shared, "I fight a lot with my unnie. Just like any other sisters, we fight using curse words. We usually fight because of clothes. If I wear her clothes without telling her, she finds out about it instantly and contacts me. I get scared so I tell her 'no' (I didn't wear it) but then starts the fight."

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She continued, "Unnie is good with her words so I cannot win. My blood pressure rises when I fight with her. So I end up blocking her on messenger."