She had a relationship with W W O'Hara.
Data from Johnson co. History Book pub. 1985 p. 771 !FPC 1900 Alvarado, Johnson Co TX. Pct 4 Vol 45 or 65 ED 62 Sheet 6 line 33 or 35: Sansom, Byron M. Jan 1857 age 43 TX., Margaret (Ella Wellborn ?) wf Nov 1856 43 TN., Annie d Aug 1884 15 TX., Samuel (Robert Paul) s Aug 1887 12 TX., Byron s Sep 1891 8 Tx., Elmer (Eleanor) d Aug 1895 4 TX., Infant d Sep 1899 8/12 TX. !Annie doesn't appear with her family in the 1910 FPC when she would have been 25 years old.
The data shown has no sources.