A WOMAN has been charged over the crash which killed a mother and her son, also leaving a little girl fighting for life.
Picton mum Julie Bullock, 49, and her son Hudson, 7, tragically lost their lives while seven-year-old twin Sienna suffered critical injuries after another allegedly car crossed onto the wrong side of the Hume Highway and collided head on with the family on their morning school run.
The 49-year-old woman who was driving the other car near Wilton was trapped for some time before she was released and taken to Liverpool Hospital in a critical condition before she was stabilised.
Sienna and Hudson Bullock, 7. Sienna was badly hurt in the crash, while her twin brother was killed.
After months of inquiries, the Metropolitan Crash Investigation Unit have charged the woman with two counts of dangerous driving occasioning death, dangerous driving occasioning grievous bodily harm and negligent driving occasioning death.
She is due to front Picton Local Court on September 5.
Witnesses have alleged her vehicle veered across a median strip of bushes before it crashed head-on into Ms Bullock's Mazda 4WD.
Earlier this year Ms Bullock's husband, Darren, spoke about the despair of losing half of his family as mourners gathered to farewell his wife and son.
In his eulogy he spoke about how Ms Bullock had desperately wanted to have children and they had tried IVF seven times before Hudson and Sienna were conceived.
"Julie was a natural mother. She always put her kids first, me second and her last," he said.
He ended his tribute: "All our lives were better for the love you brought to us. Hold each other tight and we'll all cuddle again one day."
At the time, Mr Bullock said Sienna, who suffered serious head and back injuries, was finally home from hospital. He said she would have a "long recovery" but would be OK.