My younger sister who keeps stealing my things—saying it's unfair, unfair—and me, the older sister, scolding her for being sneaky. I did it with your best interests in mind, but it seems my feelings didn't get through to you after all. Dear sister.

The older sister, exhausted from her younger sister constantly stealing her belongings and making them her own, was relieved when she became engaged to the crown prince, finally able to escape from her sister. However, the younger sister complained to the crown prince that the older sister had stolen her necklace, and even though the older sister protested her innocence, he wouldn't listen. He broke off the engagement, condemned her, and banished her to a remote frontier. "I have never stolen anything from my younger sister. I will prove it and turn the tables by condemning all of you instead." What is the older sister's revenge method?