AMIRAH Droudis has been sentenced to 44 years in prison for the brutal stabbing murder of her lover Man Monis's wife, whose body she doused in petrol and set alight in a suburban Sydney apartment block.
Droudis, 37, will serve a minimum of 33 years in Silverwater Women's Correctional Centre where Justice Peter Johnson said she remained "committed to her Muslim faith".
Droudis, who became radicalised by Monis, carried out what Justice Peter Johnson described as "a hot-blooded and frenzied murder" at the Lindt Cafe gunman's behest in 2013.
The mother of Monis's children, who can only be identified with the pseudonym "Helen Lee", died in the ferocious and ritualistic killing after he lured her to the Werrington flat where he lived.
At the time, Monis had tricked his children into calling Droudis "Mummi" and the couple planned to form a new family with them once their real mother was gone.
Monis's first wife went to his apartment block where she was murdered as part of an access visit for Monis with their young sons.
Justice Peter Johnson described the "savage and sustained knife attack" followed by fire to eliminate any chance of Ms Lee's survival.
He said it was a "cruel and callous attack on a defenceless woman" and that "the setting alight of the body was a gratuitous act of defilement" of Monis's ex-wife.
The day after the murder, Droudis and Man Monis and filmed "family" scenes of themselves with their children.
Justice Johnson said Droudis "knew the killing of Helen Lee would deprive two young boys of their mother and Helen Lee's parents of their only child".
He said the "harm and loss would continue indefinitely" for Ms Lee's family.
Man Monis set up the murder in April of the year before he took hostages and murdered Lindt Cafe manager Tori Johnson.
During the murder trial the court heard that Ms Lee's killing was Monis' plan to seek "God's vengeance" over a family dispute.
Monis was on bail on charges of accessory to the murder when he died in the Sydney siege in December 2014.
Droudis, a Greek Australian who converted to Islam along with her young daughter after meeting Monis, executed his plan to have his ex-wife "burnt in the fire of hell".
She did so while wearing a black hijab and carrying petrol and matches and setting fire to Ms Lee in an apartment block filled with residents, Mr Johnson said.
A resident of the Werrington flats who witnessed the horrific murder said that Monis' first wife pleaded for her life as she was stabbed to death on the landing, crying "I have children, I have children".
Home video played during the trial showed Monis and his two children along with Droudis and her child eating dinner, reading and playing before bed.
Justice Johnson said that prior to the murder Droudis and Monis had been "acting like a single family unit" and that Ms Lee had become agitated about Droudis behaving like her sons' mother.
On regular access visits Droudis kissed the boys, gave them gifts and they called her "Mummi" because Monis told his sons that was her first name.
Justice Johnson said he was "satisfied beyond reasonable that Monis set about to effect the murder of his former wife".
He said after a court battle with Ms Lee, he decided "God's law" would decide who gained custody of his sons.
Painting a picture of how Amirah Droudis fell under Monis's spell to the point she would murder her rival in his affections, Justice Johnson said they had begun a sexual relationship in 2006.
Droudis had then changed her first name of Anastasia to the Arabic name Amirah and had converted to Islam.
By 2008, calling herself "Sister Amirah" she was making "extremely offensive videos" for his website.
In eleven videos, her face partially covered in a black niqab, Droudis praised Osama bin Laden, pronounced a fatwa on President Obama, expressed happiness about 9/11 and the Holocaust, called the Bali bombers "martyrs" and warned Kevin Rudd that Australians could be killed by Muslims.
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