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A woman admitted to killing her husband by throwing a knife at him when he arrived home late.

Katie Anne Castel, 38, pleaded guilty to killing Jarred Paul Castel during a heated argument at their home in Brisbane, Australia.

The mother-of-one threw a knife at her husband's bare chest as he stood in the kitchen around two metres away, prosecutors say.

Judge Geary, presiding over the case, described Castel's actions as "totally disproportionate to the nature of the disagreement".

The judge added that Mr Castel's death was "reasonably foreseeable" based on his wife's actions, reports the Mail .

(Image: AAP/PA Images)

A victim impact statement from Mr Castel's father, brother and sister said his wife had no remorse and was psychologically abusive towards her husband.

The court heard how the knife had lodged in his chest, creating a 4cm wound.

He managed to pull the knife from his body before dying from the stab injuries.

The court heard Mr Castel was not threatening his wife in any way at the time of the attack.

Castel, mother to the couple's five-year-old son, was initially charged with murder before accepting a plea of manslaughter in a domestic violence context.

She is due to be sentenced at Brisbane Supreme Court later this week.