"The old girl [Knight's mother] said to me to watch out. 'You better watch this one or she'll fucking kill you. Stir her up the wrong way or do the wrong thing and you're fucked, don't ever think of playing up on her [cheating on her], she'll fuckin' kill you.' And that was her mother talking! She told me she's got something loose. She's got a screw loose somewhere."

On their wedding night, Knight tried to strangle Kellett; she later explained it was because he fell asleep after only having intercourse three times.

The marriage proved particularly violent and, on one occasion, a heavily pregnant Knight burned all of Kellett's clothing and shoes before hitting him across the back of the head with a frying pan, simply because he had arrived home late from a darts competition after reaching the finals. In fear for his life, Kellett fled before collapsing in a neighbour's house, and he was later treated for a severely fractured skull. Police wanted to charge Knight, but she changed her behavior to ingratiate Kellett and talked him into dropping the charges.

In May 1976, shortly after the birth of their first child, Melissa Ann, Kellett left her for another woman and moved to Queensland, apparently unable to cope with Knight's abuse. The next day, Knight was seen pushing her new baby in a pram down the main street, violently throwing the pram from side to side. She was admitted to St Elmo's Hospital in Tamworth, where she was diagnosed with postnatal depression and spent several weeks recovering. After being released, Knight placed two-month-old Melissa on a railway line shortly before a train was due; she then stole an axe, went into town and threatened to kill several people. A man known in the district as "Old Ted", who was foraging near the railway line, found and rescued Melissa, by all accounts only minutes before the train passed. Knight was arrested and again taken to St Elmo's Hospital, but, apparently recovered, signed herself out the following day.

A few days later, Knight slashed the face of a woman with one of her knives and demanded she drive her to Queensland to find Kellett. The woman escaped after they stopped at a service station, but by the time police arrived, Knight had taken a young boy hostage and was threatening him with the knife. She was disarmed when police attacked her with brooms and was admitted to the Morisset Psychiatric Hospital. Knight told the nurses she had intended to kill the mechanic at the service station because he had repaired Kellett's car, which had allowed him to leave, and then kill both her husband and his mother when she arrived in Queensland. When police informed Kellett of the incident, he left his girlfriend and moved to Aberdeen with his mother to support Knight.

Knight was released on 9 August 1976 into the care of her mother-in-law and, along with Kellett, moved to Woodbridge, a suburb of Brisbane, where she obtained a job at the Dinsmore meatworks in nearby Ipswich. On 6 March 1980, they had another daughter, Natasha Maree. In 1984, Knight left Kellett and moved, first to her parent's house in Aberdeen, then to a rented house in nearby Muswellbrook. Although she returned to work at the abattoir, she injured her back the following year and went on a disability pension. No longer needing to rent accommodation close to her work, the government gave her a Housing Commission residence in Aberdeen.

Other relationships

David Saunders

Knight met 38-year-old miner David Saunders in 1986. A few months later, he moved in with her and her daughters, although he kept his old apartment in Scone. Knight soon became jealous regarding what he did when she was not around and would often throw him out. He would move back to his apartment, where she would invariably follow and beg him to return. In May 1987, she cut the throat of his two-month-old dingo pup in front of him, for no more reason than as an example of what would happen if he ever had an affair, before going on to knock him unconscious with a frying pan. In June 1988, she gave birth to a third daughter, Sarah, which prompted Saunders to put a deposit on a house; Knight paid off the deposit when her workers' compensation came through in 1989. Knight decorated the house throughout with animal skins, skulls, horns, rusty animal traps, leather jackets, old boots, machetes, rakes and pitchforks. No space, including the ceilings, was left uncovered.

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