When Maria Doris Axiak's husband told her he wanted to separate after 28 years of marriage she was upset.
She called her daughter and said she wanted to tip out all his wine or pour hot water over him.
Her daughter tried to calm her down but Axiak ended the call, filled a pot with water and set it on the stove to boil.
Axiak disconnected the landline, took her husband's phone and went outside for a cigarette before returning to the boiling pot.
She took the pot from the drove and threw the boiling water over her husband's head and body as he slept.
Axiak drove away from the house, taking her husband's phone and keys with him, forcing him to go to a neighbour's house to call for help.
The husband called Axiak's daughter for help, and while he was on the call Axiak arrived, telling her daughter she needed to stay the night.
She told her daughter he "deserved it after 20 years of misery". She wanted him to be reminded of it every day.
John Axiak required surgery and skin grafts for the burns which covered 12 per cent of his body.
Axiak texted her daughter saying she hoped he had to stay in hospital at least a month, alongside a thumbs up and clapping hands emoji.
Axiak was sentenced in the County Court on Friday to a three-year court order for mental health treatment and supervision.
Judge Claire Quin said Axiak had planned the assault and taken deliberate steps, calculated to prolong his suffering and ensure he didn't receive urgent medical treatment.
While she spent 37 days in custody before being granted bail for the 2018 offending, Judge Quin said Axiak had been so affected by mental illness prior to and during her offending that a prison sentence was not an option.
Axiak, 58, was raised in a village in Malta by alcoholic parents and a violent mother, and was only educated to primary school level. She has been diagnosed with PTSD and has spent periods in psychiatric care, including shortly before the incident.
Her husband suffered extensive and permanent scarring as a result of the attack, but said the scarring did not restrict him in any way and he had no ongoing psychological issues.