After Picking up the Amnesiac Prince-In-Law

Everyone knows that the prince-in-law and the princess have a deep love for each other. The princess fell in love with the prince consort. I love her so much that during the palace banquet, the prince-in-law casually complimented my sister on her excellent piano skills. The princess sent people to torture and kill her sister. When the prince-in-law learned about this, he just felt sorry for the princess and had dirty his hands for such a low-class person. Later, I picked up the prince-consort who had lost his memory and fell off a cliff in the mountains. As we got along day after day, he fell in love with me and promised to be with me forever. I know, my chance to avenge my sister has come