Irregular Family Tree

Many many years ago when I was twenty three,
I got married to a widow who was as pretty as could be.
This widow had a grown up daughter,
Who had hair of red.
My father fell in love with her,
And soon the two were wed.

This made my dad my son-in-law,
And changed my very life;
My daughter was my mother,
For she was my father's wife.

To complicate the matters worse,
Although it brought me pride and joy,
I soon became the father
Of a bouncing baby boy.

My little baby then became
A brother-in-law to dad
And so became my uncle,
Though it made me very sad.

For if he is my uncle,
Then that also made him brother
To the widow's grown up daughter
Who, of course, was my step mother.

Father's wife then had a son,
Who kept them on the run.
And he became my grandson,
For he was my daughter's son.

My wife is now my mother's mother
And it makes me very blue.
Because, although she is my wife,
She is my grandmother too.

If my wife is my grandmother,
Then I am her grandchild.
And every time I think of it,
It simply drives me wild.

For now I have become
The strangest case you ever saw.
As the husband of my grandmother,
I am my own GRANDPA!