Tina Cahill has been jailed for stabbing her new fiance to death.
The Wexford woman stabbed David Walsh, 29, once in the neck in the early hours of February 18 last year, at the Sydney home they shared with two other Irish nationals.
The 27-year-old was originally charged with murder, but pleaded guilty to manslaughter based on substantial impairment due to an abnormality of the mind.
The couple were said to be in a volatile relationship involving aggression on both sides.
At the New South Wales Supreme Court on Wednesday, Cahill, known as Tina, was sentenced to eight years in jail, with a non-parole period of five years.
Her earliest release date will be in February 2022 when she is expected to be deported to Ireland.
Justice Peter Johnson told the court: "I am satisfied the psychiatric evidence supports the existence of significant depression on the part of the offender at the time of the killing which arose from the unusual and abusive relationship with Mr Walsh."
The fatal incident occurred when an intoxicated Mr Walsh launched an unprovoked attack on a man who had been invited into the home in Padstow, a suburb of Sydney, by Cahill and the two other female housemates after they met him at the pub.
Cahill, who also had been drinking, tried to stop the attack, before she took out a "large, very sharp" knife from the cutlery drawer and stabbed him.
At the time, she was on a good behaviour bond and the subject of an apprehended violence order issued to protect Mr Walsh, after she was convicted of recklessly wounding him with a glass candle holder in 2015.
Cahill gave evidence about his repeated violence, including punching strangers and biting her all over her body, and said he accused her of sleeping with other men and deleted texts from her phone.
The judge accepted her account of Mr Walsh's controlling and demeaning conduct, observing their marriage was "doomed to fail".