A physician visited a California mental institution and asked a patient,
---
"How did you get here? What is the nature of your illness?"
He got this reply.
"It started when I got married and I guess I should never have done it. I got
hitched to a widow with a grown daughter who then became my stepdaughter."
"My Daddy came to visit us, fell in love with my lovely stepdaughter, then married
her. And so my stepdaughter was now my stepmother."
"Soon my wife had a son who was, of course, my daddy's brother-in-law since he is
the half-brother of my stepdaughter, who is now, of course, my daddy's wife. So as I told
you, when stepdaughter married my daddy, she was at once, my stepmother. Now since my new
son is brother to my stepmother, he also became my uncle."
"As you know, my wife is my step-grandmother since she is my stepmother's mother.
(Don't forget that my stepmother is my stepdaughter.) Remember, too, that I am my wife's
grandson."