Many, many years ago when I was twenty-three, I was married to a widow who was 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 they too were wed

This made my dad my son-in-law and really changed my life
For my daughter was my mother cause she was my father's wife
And to complicate the matter, even though it brought me joy
I soon became the father of a bouncing baby boy.

I'M MY OWN GRANDPA!