Looks like Sarah b abt 1817-1818 gave three different places of birth: Wiveliscombe in 1851, Wellington in 1861 & 1871 and Thorne St Margaret in 1881 which are all within approx 7 miles of each other. She is recorded as a widow from 1861 onwards with three children James, Eliza & Anna/Annie/Ann.
Might have to resort in getting the marriage certificate?