Melbourne mum left baby in sweltering hot car for five hours to play pokies

Kaija Millar was jailed for a maximum of three years. Photo / News Ltd

WARNING: Distressing content

An "appalling" Aussie mum played pokies for five hours while her 14-month-old son sweltered in a car as temperatures soared outside.

Kaija Millar was jailed for a maximum of three years in the County Court of Victoria today after pleading guilty to negligently causing serious injury to her son in January last year.

She must serve at least 12 months before being eligible for parole.

The 34-year-old woman drove to The Brook Pub in Point Cook, in Melbourne's west, about 9.50am and left her son in the car.

While he was left in the car with no air-conditioning and the windows rolled up, Millar played the pokies and bingo.

It wasn't until just before 3pm that the first-time mother went to check on her son. By then temperatures had already peaked at 37.5C.

Kaija Millar played the pokies and bingo while her son was left in the car with no air-conditioning. Photo / News Ltd

She found her son having fits with wide open eyes and his skin had changed colour.

The woman ran back into the pub screaming for help.

"He's going to die, he's going to die, don't die bubba," Millar yelled.

She begged witnesses not to tell her husband as paramedics rushed to the scene.

But she went on to tell paramedics and officers lies about what she did and how her son was injured.

The woman blamed the injuries on bushfire smoke and also said she checked up on him while at the venue.

During the sentence hearing, Judge Felicity Hampel said the shocking event was not a tragic accident or something unforeseen.

"Your son suffered these injuries because you left him unattended and uncared for in that hot, windows-closed, locked car in an open-air carpark on a scorching day while you were inside for five hours."

The behaviour was "appalling" and her actions left her only child with devastating consequences, the judge said.

Her son has been left seriously disabled and is now blind, struggles to speak and has cerebral palsy.