Sherbourne was born in Point Partageuse, Australia; Sister of Hugh and Alfred (Alfie) Graysmark who preceded her in death from war; and daughter of Violet and Bill Graysmark who had recently preceded her in death at their home in Point Partageuse, where she had resided until married.
Married to Tom Sherbourne, a war hero who was positioned as the lighthouse keeper of Janus Rock, where they had rescued the missing child Grace (Lucy) Roennefeldt and her deceased father Frank Roennefeldt.
Sherbourne and her husband later settled in Hopetoun to reside for their elder age where she had