Victoria's DPP is appealing to the High Court over a decision to cut the jail term for a woman who killed three of her children and tried to murder another.
Akon Guode was jailed for 26-and-a-half years, with a minimum 20 years, for murdering her four-year-old twins, killing her 16-month-old son and trying to murder a fourth child by driving them into a lake in 2015.
The term was reduced on appeal to 18 years, with a minimum of 14 years.
Director of Public Prosecutions Kerri Judd QC has filed an application with the High Court for special leave to appeal the Court of Appeal decision.
Guode last year pleaded guilty to one charge of infanticide, two charges of murder and one charge of attempted murder after driving a car containing four of her children into a Wyndham Vale lake in 2015.
Her four-year-old twins Hangar and Madit and her 16-month-old son Bol were killed.
Last month, the Court of Appeal reduced her sentence, finding it "manifestly excessive" given her disturbed mental state.
Chief Justice Anne Ferguson and judges Phillip Priest and David Beach said they had not "lost sight of the fact that three vulnerable children lost their lives" and a fourth nearly did, but the Sudanese refugee's situation was "pitiable".
In war-torn Sudan, Guode saw her husband killed and was then raped until she was unconscious before fleeing in 2003 with three daughters to Uganda where she was granted refugee status.
In 2009 in Melbourne, she started a relationship with Joseph Manyang, who lied to her and said he had split with his wife.
The pair went on to have four children and he offered little support.
When Mr Manyang's wife discovered the affair, problems flared between her and Guode, with the latter becoming estranged from the local Sudanese community.
During the birth of Bol, she suffered a significant haemorrhage and needed life-saving surgery.
She also developed depression and had post-traumatic stress disorder.
The appeal judges found Guode "fatefully and irredeemably breached" her children's trust when she drove them into the lake, but "her capacity to make calm and rational decisions was severely compromised by a mental condition which was not of her own making".
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