"After a couple of years, my father fell in love with my step-daughter and so my father became my son-in-law and I became my father's father-in-law.
My daughter is my mother and my wife my grandmother. More problems occurred when I had a son. My son is my father's brother and so he is my uncle. Situations turned worse when my father had a son. Now my father's son I.e. My brother is my grandson.