The 51-year-old was found guilty last year of murdering her husband's parents and an elderly aunt in 2023 by serving them a beef Wellington lunch laced with lethal death cap mushrooms.Patterson was also convicted of the attempted murder of her husband's uncle, a small-town local pastor who survived the beef-and-pastry dish after weeks in hospital.At a two-day Melbourne court hearing that came to a close Thursday, Patterson sought to overturn her triple-murder conviction while prosecutors demanded she stay in jail for life.Following her conviction, Patterson was sentenced to life imprisonment.But the trial judge ruled she would be eligible for parole after 33 years, when she would be 83, taking into account that much of incarceration would be spent in isolation due to the notoriety of her case.Prosecutors insisted, however, that the evidence did not substantiate the claim Patterson would be in isolation for "many years to come".Patterson's crimes involved "betrayal" and represented "worst-case offending", they told Court of Appeal judges at a hearing in Melbourne.The 33-year non-parole period did not reflect the seriousness of her crimes, Director of Public Prosecutions Brendan Kissane told the judges.