Vic driver 'crushed' over NSW pair's death

Two NSW children can't understand why their parents never came home from their trip to Melbourne.

Fernando Marino, 33, and Karen McGovern, 31, were run down and killed by a speeding driver in August 2011, leaving their two young children orphans.

The Albion Park couple were on a short trip to Victoria to watch Ms McGovern's beloved AFL team the Sydney Swans play at the MCG.

Ms McGovern's mother Elizabeth said the children, aged eight and five, could not comprehend their parents' deaths.

"They don't understand how their mum and dad went on a little trip and never came back," she told the Victorian County Court on Thursday.

In a short statement read to the court, the couple's eight-year-old son said he missed living at home with his parents.

"I get sad all the time," he said.

Kathryn Eliza Matiszak, of Keilor, has pleaded guilty to two counts of dangerous driving.

The court has previously been told that Matiszak was travelling more than 15km/h over the speed limit and ran a red light before the collision.

Judge Damian Murphy said the crash was caused by substantial inattention.

Ms McGovern's father Peter McGovern told the court that Matiszak had imposed a death sentence on his daughter and her partner for no reason.

"In one minute of madness she took a sister, daughter, mother and father," he said.

"I can never, ever forgive this person for the lives she has destroyed."

Defence barrister Peter Morrissey SC said Matiszak was now a crushed woman.

"Her reaction has been pitiable, floundering and hopeless," he said.

He said the 31-year-old could no longer care for her son, and had resumed taking heroin after years of rehabilitation.

Psychiatrist David Leonard said Matiszak suffered from severe anxiety and depression, and had heard voices since the incident.

"Her remorse truly is dreadful to behold," Dr Leonard told the court.

Judge Murphy will sentence Matiszak on May 19.