Mother left her two-year-old son in a washing machine, to "get away from his screaming."

A mother left her two-year old son in a dark washing machine in order to get away from “his screaming,” a Queensland court has heard.

The mother in question has committed “cruel, physical” violence upon the children of her ex-husband leading to a Federal Circuit Court fight in Cairns.

Despite being reported as an “extremely intelligent woman,” fluent in several languages, the mother allegedly committed horrific acts of abuse upon her husband’s teen children. The court heard of one particular instance involving the woman chasing his son, who has Asperger’s syndrome, around with a stick covered in toilet paper and faeces.

She also told his daughter she was “a psycho like her father,” and had a physical altercation with her.

The couple split in 2012 when the mother left their son, then three-years-old, with the father to go on an unannounced overseas business trip.

Judge Josephine Willis expressed concern over the fact that the mother had been "grooming" their youngest son what to say about his father in court, according to hundreds of recordings.

"It is overwhelmingly clear that the mother is attempting to run a major smear campaign against the father and that she has used the child in these efforts in a direct way," said Judge Willis.

After 11 days in hearing, custody of the child has been awarded to the father with only weekend and holiday access allowed to the mother, and the boy's name has been put on airport watchlists.