My wife and I have been married for about 4 years now. This man is my biological father. My biological mother passed away and we live with my parents and wife. And the woman here is the wife's mother. It corresponds to the so-called [mother-in-law]. Occasionally, [mother-in-law] comes to my house to see my wife, and I am living my days peacefully. But I don't know what to do… My father had such a relationship with my mother-in-law… At that time, I stood there speechless…