Can you answer this riddle?

Question

Many many years ago when I was twenty three,
I got 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 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 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 was 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.

Who is my grandma?

Answer 1

Your wife is now your mother's mother
And it makes you blue.
Because, although she is your wife,
She's your grandmother too.

If your wife is your grandmother,
Then you are her grandchild.
And every time you think of it,
It simply drives you wild.

For now you have become
The strangest case I ever saw.
As the husband of your grandmother,
You are your own grandpa!

Answer 2

your mother can be the grandma of your children
your wife the grandma of her daughters child

Answer 3

This is taken from "I'm My Own Grandpaw" it was in a C/W song by Dwight Latham &Moe Jaffe http://www.wwco.com/gean/grandpa/

Answer 4

Your two grandmas are still your moms mom and your dads mom. They ain't got nothing to do with all that other stuff.

Answer 5

your father mother is your grandma and your wife is your step grandma

Answer 6

your fathers mother and your daughter

Answer 7

his wife, because that is his father's mother.

Answer 8

Ugh! SO COMPLICATED! Are u a grandma? lol i just guess. Maybe im right.

Answer 9

my wife

Answer 10

Your mom is your grandma.