A pregnant Melbourne woman who bludgeoned her "generous" great-aunt to death with a hammer has been sentenced to 18 years' prison.
Jessie Moore murdered greyhound trainer Karen Leek as she sat in her recliner chair watching Home and Away at her Devon Meadows home in May 2020.
Moore had been living with Ms Leek when their relationship soured over Moore's drug use, and when the pair began to argue Moore fetched a pair of rubber gloves and bludgeoned Ms Leek with a hammer.
An autopsy found she was struck at least a dozen times, before Moore covered Ms Leek's face with a plastic bag.
After the killing Moore took the hammer and some of Ms Leek's personal belongings, and then went to KFC and bought cigarettes.
She returned to Ms Leek's property the following day and called triple zero, pretending she had discovered the body and had no idea who might have killed her great-aunt.
But a diary revealing Moore's "hatred and animosity" for her victim was later found at Moore's new house in Berwick, along with the blood-stained murder weapon stashed inside a series of plastic bags.
Moore was arrested and charged the day before giving birth to her second child.
In sentencing on Wednesday, Justice Paul Coghlan said Moore had a complex psychiatric makeup and a history of drug use, and had experienced an entirely dysfunctional upbringing.
Moore had been exposed to family violence and had begun binge drinking at the age of 15.
Her father later introduced her to the drug ice, which she had just stopped using at the time of the murder.
Justice Coghlan found Moore's capacity to think clearly was impaired when she killed her aunt, reflecting her borderline personality disorder and borderline intellectual functioning.
But he said the attack had been brutal and sustained, on an unarmed victim who had been generous to her and had provided her with a home.
Moore pleaded guilty to murder, and Justice Coghlan said her early plea, along with other mitigating factors, meant she would be sentenced to a shorter jail term.
"You clearly regret what you have done," Justice Coghlan told her.
He said it could only be hoped that the pain her family was feeling would lessen over time.
"The crime of murder is traumatic for victims, but when the crime occurs within a family it is particularly so," he said.
Moore will serve a non-parole period of 13 years.