Who are they?

The day of birth is such a joy,
to pick your kin is such a ploy,

While growing up with controlling peers,
Left my heart shedding many tears.

Though I was the eldest child of two,
Responsibilities for me only grew.

Cooking, Cleaning, Dusting Galore,
trying to get sister to help is a chore.

After all the years of pleasing Mom & Dad,
Never a thank you or smile only left me quite sad.

More years of talk, lies, and mean things to say,
I finally cut ties one bright summer day.

The letter was simple but spoke quite a note,
No longer my family I read with a choke.

I love them no matter one way or the other,
I never once broke they made me a great Mother.