Jack Pink, 19, was driving a Pantech truck full of furniture and his sisters Marina, who would have turned 18 today, and Destiny, 15, were following in a car when the crash happened on the Newell Hwy, south of Boggabilla, just after 6am. All three died at the scene.
The Kiwi mother of three teenage siblings killed in the crash has sent a heartfelt message to her children.
In a Facebook post shared early this morning, Jaze Pink, formerly of Auckland, shared memories of this day 18 years ago, when she went into labour with her fourth child.
"Marina Gillian Aroha Pink, perfect in every way.
"My exercise buddy, my breakfast-maker.''
Pink also acknowledged her two other children killed in yesterday's crash, saying Marina kept Jack, 19, on his toes and liked to give younger sister Destiny, 15, lectures.
"I miss you more than words could ever say,'' their mum wrote.
"Keep your brother and sister in line. I love you my girl. Never leave my heart.''
New South Wales police are investigating the crash, which happened just after 6am (local time) yesterday.
Emergency services were called to reports of the crash on the Newell Highway, Boggabilla, involving a fuel-tanker, a truck with a trailer and a car.
Initial reports said two women in the car died at the scene.
The driver of the truck, understood to be Jack Pink, was also killed at the scene.
The family were well known in the show circuit community and were members of The Showmen's Guild of Australasia.
Members of that community and the public are rallying to support the extended family.
A GoFundMe page set up yesterday had raised more than AU$83,000 ($88,000) by 4.30pm today NZT.
To donate, visit: Pink Family Support