There used to be a classic joke, but I forgot it. ....

I married a widow, and she had an adult daughter, so her daughter became a widow.

My stepdaughter. My father came to see us, and he fell in love with my lovely stepdaughter.

And marry her. So my stepdaughter is now my stepmother. Soon my wife gave birth to a son,

Of course, because my son is my stepdaughter and my father's wife,

My half-brother, of course he is my father's brother-in-law now.

So as I told you, when my stepdaughter married my father, she immediately became my stepmother.

Now because my newborn son is my stepmother's brother, he has become my uncle.

As you know, because my wife is my stepmother's mother, she has become my stepgrandmother.

Don't forget, my stepmother is my stepdaughter. Remember, I am also my wife's grandson.

But hold on a little longer. You know, ever since I married my stepgrandmother,

I am not only my wife's grandson and husband, but also my own grandfather. That's about it.