Mary Mutton (Parsons) - DNA Conformation required

My mothers DNA has no matches to a cousin on fathers side also to have descended from this line in South Australia Johanna Mutton and Richard Kerslake.Johanna marries secondly Joseph Grigg as per this tree https://www.ancestry.com/family-tree/tree/68954602/family/pedigree

Mums line:
You
→ Lynette Marie Evans
your mother → Patrick Evans
her father → Isabella Annie Lavinia Beckmann
his mother → Grace Peters Aunger
her mother → Simon Hodge Aunger
her father → Ann Skews
his mother → Catherine Aunger
her mother → Mary Mutton
her mother