31-year-old blogger Heather Croxon has died in Royal North Shore Hospital's intensive care unit after being struck by an out-of-control car last Friday.
Croxon was walking on Victoria Avenue near Chatswood Chase Shopping Centre in Chatswood just before 8:30am when a car mounted the foot path, flipped and clipped a pram before striking her.
The child in the pram was uninjured.
"Unfortunately things don't always work out the way we planned," Ms Croxon's sister, Amanda, posted online in a touching tribute to her big sister Wednesday night.
"Today I said goodbye to my beautiful big sister who, as I held her hand, she took her last breath and passed on peacefully."
Ms Croxon was originally from Davistown on the Central Coast and had recently moved to Chatswood to work in office administration.
It is understood that police are investigating whether the 67-year-old driver of the vehicle, who was treated for minor injuries, suffered a medical episode before the crash.
Ms Croxon's sister also thanked the "amazing" hospital staff for their care over the last five days.
"You made a horrible time bearable and so much love, respect and consideration was given to us," Amanda said.
"You guys are living breathing angels in every way and you gave my sister dignity and love when she was most vulnerable."
At the time of the accident, witness Oubie Elrish told the Sydney Morning Herald he was standing on Victoria Avenue when the crash happened in front of him.
""Lady's walking [and] stopped off to get a coffee and all we know is that he [the driver] mounted that curb, lady was walking that way, [the car] collected her, collected the second lady," Mr Elrish said.
"The second lady was alright, but the first lady was all bloodied and bruised. It wasn't a good sight."
The owner of nearby Peking Duk Chinese restaurant told 9 News a loud noise brought him outside to see the injured woman.
"I don't know, we working in the kitchen and boom. We quickly come out and see the car accident. There's a lady bleeding ... a lot of blood. It's very sad," he said.
Our thoughts are with Ms Croxon's family during this shocking and devastating time.