Every time my sister, who is beautiful on the outside but looks down on me, I teased her by saying, "Isn't it because your sex skills are terrible that you can't get married even in your late twenties?" She, who apparently lacks confidence, retaliated by saying, "I'm good at it! Then let's do it!" I decided to get back at her for all the resentment I've built up over time, so I said, "You lack perversion," and spread lies to impose my own fetishes on her and train her to my liking.
