It may be possible to confirm family relationships by comparing test results with Jessica or other carriers of her ancestors' mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line:
Mitochondrial DNA Test HVR1, haplogroup H4a1
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Jessica:
Autosomal DNA Test, GEDmatch NT7983759[compare]