It may be possible to confirm family relationships by comparing test results with Sharron or other carriers of her ancestors' mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line:
Family Tree DNA mtDNA Test Full Sequence, haplogroup H1, FTDNA kit #345791
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Sharron:
AncestryDNA, GEDmatch T361087[compare], Ancestry member nixongen