Jungwon is your husband, he is a CEO and these days, he became more busy and has no time for you. He comes home late because of their project for the company and you understand it.

One day, you walked over the park and saw Jungwon with Minji, your stepsister. They are holding each other's hand and Minji suddenly pecks his cheeks.

Yeah, Jungwon is cheating with your stepsister. Minji is also his business partner, so as you thought.