I have confused myself from your posting, and can't decide if Higgins was her maiden name or married name.
I found a family tree at ancestry.com, which provides some clues.
Edna Blanche (Aunt Polly) Higgins
Birth 28 Oct 1914 in Ruston, La
Death 2 Dec 1992 in Rusk, Cherokee, Texas,
She married Oscar Matthew Mondy (1895-1970)
1930 Panola County Texas
Mondy, Oscar M, head, W M age 33; b LA LA LA
Edna, wife age 17; married at age 15; b TX AR AR
John L, son age 1 yr 6 months, b TX LA TX
From the 1930 Edna is the correct age but she says she was born TX; maybe the census taker wrote it wrong.
1910 Lincoln LA census
Mondy, T W and wife and two daughters and one son, Oscar age 11
This is the only Higgins listed on
1920 Lincoln LA census
Higgins, Claud age 23 b MO MO MO
Emma, age 20 b AL AL AL
xxx, dau age 2 b LA MO AL (can't read, but has an l on the end)
This family is living in Union Parish on the 1930
they have a 12 year old son named Cecil. Other children are Louise, Claude, Mary and John Wesley.
On the 1920 Bossier LA
Watts, David, black, age 42, b LA LA LA
Connie, wife, MU, age 28 b MS MS MS
Higgins, Edna, MU, step-dau, age 5 b LA MS MS
b Oct 28 1914
d Dec 2 1992
Rusk, Cherokee, Texas
I'm sorry I don't think I've found your answer.
Sandra Van Wyk