I have just looked back on the birth for Sarah it states that they were married on the 2 May 1880,
even though the marriage for Sarah Smith that her father was John Smith a Carrier at the time born Mudgee, NSW and he was informant also to the birth of Sarah, the marriage & death records for Sarah state her mother is Annie Bruce marriage states the mother was deceased at time of death.
The only reason I am going with Honora Sullivan being the mother is that her death coincides with the story told by Sarah to one of her children. Sarah never went back to see her family once she joined the circus as an actress after her mother passed away.