She is her sister’s mother. She is her own aunt. Interesting.
Oh, 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 the two 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
Though it really brought me joy
I soon became the father
Of a bouncing baby boy
This little baby then became
A brother-in-law to Dad
And so 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 is my step-mother
Chorus
I'm my own grandpa
I'm my own grandpa
It sounds funny I know
But it really is so
Oh, I'm my own grandpa
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
Now 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 grandma
I am my own grandpa
After starting a new file on the Family Tree Maker geneology software program and calling the original parents John and Jane, the daughter Doris and the granddaught Mary, this is what the "Kinship Reports" looks like.
*********
Kinship of John Doe
Name ........ Relationship with John Doe
Doe, Doris ..... Daughter
....................... Wife
Doe, John ..... Self
....................... Son-in-law
....................... Father-in-law
Doe, Mary ..... Daughter
....................... Granddaughter
....................... Half sister-in-law
Smith, Jane ..... Wife
....................... Mother-in-law
*********
Kinship of Doris Doe
Name ........ Relationship with Doris Doe
Doe, Doris ..... Self
....................... Wife of the father
....................... Daughter of the husband
Doe, John ....... Father
....................... Husband
Doe, Mary ..... Daughter
....................... Half sister
....................... Granddaughter of the husband
Smith, Jane ..... Mother
*********
Kinship of Mary Doe
Name ........ Relationship with Mary Doe
Doe, Doris ..... Mother
....................... Half sister
....................... Wife of the grandfather
Doe, John ..... Father
....................... Grandfather
....................... Half brother-in-law
Doe, Mary ..... Self
....................... Half aunt
....................... Half niece
Smith, Jane ..... Grandmother
....................... Wife of the father
********
Family Tree Maker also strongly advised me and all the other members of my Doe family that family reunions were not an appropriate place to score.
And her father is also her kid’s father and grandfather. This family tree looks more like a bush. Which is a theory why incest is illegal and taboo in almost all societies. It makes it too difficult to figure out family relationships.