As far as I know Sarah's father may be William Reid born about 1780-1790 in Georgia. He died after 1840 and before 1850. His wife was Elizabeth, also born Georgia.
Reid children born in Mississippi:
Jesse Whatley Reid 1818 - 1905 m.1 Jane Woodruff m2 Jerusha Gilbert
Elizabeth Reid m. 1826 - ? m1 Algernon Sidney Lenoir
Enoch Spinks Reid 1828-1913 - m1 Louisa Elliott; m2 Charlotte Netherland;m3 Lucinda Martin; m4 Mary M. Smith
Elbert W. Reid 1830-1872 m. Elizabeth Mullins
Thomas B. Reid 1832-1863 died during Civil war - his will lists all of his living siblings. No wife is listed in the will.
G. Jackson Reid 1834-?
Sarah J. Reid 1836 - bef 1880 -m. William Bird Gilbert
William Reid 1841 - ? m. Elizabeth E. Miles
I don't know about siblings to the father, William Reid. Not absolutely positive that is his correct first name, but believe it is.