A woman who had a relationship with a boy less than a third her age has had her sentence significantly increased.
Heather Elizabeth Allen received a one-year minimum jail term despite having sex with the vulnerable boy multiple times per week.
The Wodonga woman was 51 and the boy 15 when the offending occurred in 2015.
The pair first communicated over Facebook when the teenager sent Allen a friend request.
He told her he was 18 and they shared sexual messages and videos.
The boy later told her he was 15 and that he had been brought up in state care and Allen went to visit him in Western Australia.
She said she would help him get his life back on track and on July 7, 2015, the boy flew to Wodonga with Allen to live with her.
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The 51-year-old claimed government benefits for having him in her care but they had sex two or three times per week.
They argued a month after he boy moved in and he locked Allen out of the house.
Police attended and arranged for the victim to be put into state care.
He told a foster mother about what had occurred in January 2017 and the boy set up a phone call to discuss what occurred and demanded $10,000 not to go to police.
Allen said if the boy reported her, she would end up "six foot under" as it would kill her.
Judge Gabrielle Cannon sentenced Allen to a one-year minimum term, three-year maximum, which an appeal court recently heard was inadequate.
Three Supreme Court justices found Allen's behaviour was "egregious".
"In our view, this was serious offending, made all the more so by the fact that the respondent chose to assume a 'quasi-parental' role in relation to the complainant," they said.
"A significantly higher (maximum) sentence, and non-parole period, were called for.
"The respondent's conduct was abhorrent, and deserved powerful denunciation."
Allen must now spend two-and-a-half years in jail with a four-year maximum.