Hume Highway, Menangle Park cement truck crash: Katrina Sila and son Kai die; baby fights for life

A mother and her two-year-old son were killed and her four-month-old baby girl is fighting for life after she veered onto the other side of the road of a busy motorway. 

Katrina Sila, 34, and her two-year-old son Kai Prahastono were killed instantly when her silver SUV slammed into a cement truck on the Hume Motorway, at Menangle Park in Sydney‘s south west, about 11.20am on Monday. 

Ms Sila’s second child, baby Ivy, was rescued from the car’s crumpled wreckage and was flown to Westmead Children’s Hospital in a critical condition. 

It is unclear exactly why Ms Sila’s car crossed from the motorway’s southbound lane into the highway’s northbound lane – although the accident was not far from a small U-turn bay.  

‘I think it is hard to think anybody did survive that wreckage – such a tragic and high-speed incident,’ said paramedic Mark Gibbs, from Ambulance NSW.

Katrina Sila, 34, pictured with her husband, son Kai Prahastono and daughter Ivy 

Pictured: Traffic on the Hume Highway following the horror crash on Monday  

Ms Sila pictured with her husband Ilham

The truck driver was uninjured and will undergo mandatory drug and alcohol testing.  

Daily Mail Australia understands Ms Sila and her grieving husband, Ilham, work in finance.

‘We are heartbroken to announce the sad passing of Katrina Sila and son Kai … a loving daughter, mother, devoted wife, sister and friend to many,’ a family statement said. 

A family photo posted online in January shows Ms Sila and her husband smiling as they craddle their son and newborn daughter in their arms. 

The dramatic accident sparked traffic chaos with the motorway closed on Monday.  

A silver SUV collided with a cement truck along the Hume Motorway under the Menangle Road overpass in Sydney at 11.20am on Monday