The 28-year-old is in a critical condition at St George's hospital after suffering severe head injuries from the accident that took the lives of her sister, Annabelle, and parents, Lars and Vivian.
Mourners turned up to St Marys Catholic Church in Concord today to pay their respects to her three family members killed in the horror crash.
According to The Daily Telegraph, a notice for the service read: 'Lars, Vivian and Annabelle will be deeply missed by Vivian’s brother Paul, his children along with many relatives and friends both near and far.'
Late last year, the Daily Mail reported that Jessica Falkholt only has a 50/50 chance of survival.
The report claims ‘the left side of Jessica's brain has been damaged, which means her personality and memory could be affected,’ according to her second cousin's husband, James Randazzo.
'She may wake up and, if she does wake up, is she going to be a different person?' he added.
Annabelle Falkholt, Jessica's little sister, was rescued from the crash alive but later died in hospital.
Their parents, Lars Falkholt, 69 and Vivian, 60, also passed away when their vehicle collided with another on the Princes Highway on the New South Wales south coast.
The third person killed by the crash was 50-year-old Craig Anthony Whitall.