I'm My Own Grandpa

Chorus:
 I'm my own Grandpa (x2)
 It sounds funny I know
 But it really is so
 Oh, I'm my own Grandpa
 Many many years ago
 When I was twenty-three
 I was married to a widow
 Who was pretty as can 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 changed my very life
 For my Daughter was my Mother
 Cause' she was my Father's wife
 To complicate the matter
 Even though it brought me joy
 I soon became the Father of a bouncing baby boy
 My little baby then became
 A brother in-law to Dad
 And soon became my Uncle
 Though it made me very sad
 For if he was my Uncle
 Then that also made him Brother
 Of the widow's grown up Daughter
 Who of course was my Step-Mother
 Chorus
 My Father's wife then had a Son
 Who kept them on the run
 And he became my Grandchild
 For he was my Daughter's son
 My Wife is now my Mother's Mother
 And it makes me blue
 Because although she is my wife
 She's my Grandmother too
 If my wife is my grandmother
 Then I'm her Grandchild
 And every time I think of it
 It nearly drives me wild
 For now I have become the strangest case you ever saw
 As Husband of my Grandmother
 I am my own Grandpa
 Chorus (fades)