She is likely an adult and married to a Coats but no familial relationship was given in her burial. No other Coates live in this parish that I've found.
Ann married COATS  [MRIN: 6532]. (COATS  was born before 1729.)
1 "Somerset, England, Church of England Baptisms, Marriages, and Burials, 1531-1812" (www.ancestry.com).