Susan was born about 1819, probably in Montgomery County, TN, or Stewart County, TN. I have little data about her an her family other than census records and marriage records.
Her husband Alfred Oliver was mentioned in Susan's father Henry's will. I have found almost nothing else about his ancestry; however, he almost certainly belonged to the Oliver family that was in Henry County from its early days.
She was probably dead by 1880 since I could not find her listed on the census in Mississippi, where they had been since no later than 1860, and where the youngest child Sarah was found in the home of her sister Elizabeth, who was then married to L. K. Richardson. Refer to marriage for confirmation that the wife was Elizabeth Oliver.
Children
Marriage: A. G. Oliver to Susan Smith, 23 July 1840, performed by J. H. Williams, JP
Henry County, Tennessee Marriages, Volume One, 1838-1852, Compiled by W. O. Inman. Published by Friends of the Library, Paris-Henry County Public Library. Printed by Winchester Printing Company, Murray, Kentucky
Marriage: Lorenzo D. Richardson to Elizabeth Oliver, 18 Feb 1869, Mississippi Co., MO
Missouri Compiled Marriages, 1851-1900 Ancestry.com [datebase on-line] Original data from Missouri Compiled Marriages, 1851-1900, compiled by Dodd, Jordan, Liahona Research
1850 Henry County, TN, p 379b: Alfred and Susan with children from oldest Francis Marion through Levi. Twins Narcissa and Elizabeth.
1860 Mississippi County, MOm p 597: Alfred and Susan with children Francis Marion (listed as Maria, female) through Tennessee and Valentine, 2-y-o twins.
1870 Mississippi County, MO, p 792: Susan was a widow, and with her were children Levi (listed as Levy), Mariah, Thomas, and Sarah, the youngest at age 7. Thomas from age given (13) appears to be Valentine from 1860 since Tennessee was female. Tennessee must have died since 1860.
1880 Mississippi County, MO, p 347a: Sarah, age given as 16, was present as sister-in-law in the household of L. K. and Elizabeth Richardson.