I married a widow with a grown daughter who then became my step daughter.
A few months later, my dad came to visit us; fell in love with my lovely step daughter, then married her. So my step daughter was now my step mother.
Soon, my wife had a son who was, of course my daddy’s brother-in-law since he is the half-brother of my step daughter, who is now my daddy’s wife.
As I told you, when my step daughter married my daddy, she was at once my step mother! Now since my son is a brother to my step mother, he also became my uncle.
As you know, my wife is my step grandmother since she is my step mother’s mother. Don’t forget that my step mother is my step daughter. Remember too, that I’m my wife’s grandson.
You see, since I’m married to my step –grand-mother, am not my wife’s grandson and her husband but I’m also my own grandfather.