Cynthia,
I'm back to reviewing Sarah again, and to answer your question, to me it doesn't matter which of Joseph's wives as I'm suggesting neither was the mother of Sarah who married William Skelton.
The following states that Joseph, linked as father to Sarah of this profile, had a daughter married to a Davis rather than a Skelton.
https://books.google.com/books?id=UhYgAQAAMAAJ&pg=RA4-PA45&...
National Genealogical Society Quarterly, Volumes 14-17
pg 45
Joseph Scales, Guilford Co., NC dated 17 Sept 1773; pr May Court, 1774. Mentions: Beloved wife Mary Scales; children Henry, Joseph, James Nathaniel, Agness and Bettsey Scales, SARAH DAVIS, and Hannah Owens.
Wikitree supplies another source that also states the daughter of Joseph Scales was Sarah DAVIS.
https://www.wikitree.com/photo/jpg/Scales-23-1
From The Heritage of Rockingham County, North Carolina 1983
THE JOSEPH SCALES SR FAMILY 940
Very little is known about the daughters of Joseph Sr. Six are mentioned in his will: Sarah who married John Davis,
Another problem with the Geni profile of Sarah Skelton (Scales) is it states she was born 1750 in Gibson County, Indiana. Indiana wasn't settled until 1789, so it would be unlikely she was born there in 1750.
Sarah Skelton (Scales) is said by some to be the daughter of Charles Sims and Isabella (Sybella) Bowles.
http://www.genforum.genealogy.com/cgi-bin/pageload.cgi?scales::skel... 'The Pioneers and Their Descendants Volume IIThe Scales Family of Georgia By Gary Donald Scales 2000 McDowell Publications 11129 Pleasant Ridge Road Utica KY 42376' page 117 of the above book reprints page 287 of a book published in 1907 which shows Sarah Sims b. ca. 1753 d. ca. 1818 as the wife of William Skelton b. ca, 1745 d. ca 1825
She may have been a Sims, but it's a problem making her the dau of Charles Sims. His dau married a SHELTON rather than a SKELTON.
Will of the father of Charles Sims, names his granddaughter Sarah SHELTON.
https://www.familysearch.org/tree/person/memories/9X6L-414
Sims: Sims of Hanover-Louisa Counties Virginia (Part A)
pg 21
Matthew Sims , Senr's, (II) rather long will (Newberry Co., SC WB-A, pg 299 dated 14 Apr 1795 (indexed under Ruebin Sim's name) named wife Jemimah Sims, son Charles Sims, . . . grandchildren William Sims and Sarah SHELTON, the son and dau of of son Charles Sims.
Also, Sarah Skelton (Scales) had her first child 1766-68. Her supposed parents Charles Sims and Isabella Bowles married 1764.
I can't see Sarah of this profile being born in Gibson County, Indiana.
I can't see Sarah of this profile being a child of Joseph and Mary Scales.
I also can't see Sarah of this profile being a child of Charles and Isabella Sims.
I'm unable to determine her parents. Would certainly appreciate any thoughts.
Dale