During the trial, the court heard how there was a "joint history" of previous altercations between the two women and that Emma McLoughlin's attention deficit disorder meant she was easily enraged.
However, Sgt Séamus Burke said that while Ms McLoughlin did have a "troubled" background, she had begun an early school leavers' programme in the months leading up to her death and was attending counselling.
"She certainly seemed to be doing much better as a result of that," he said.
The court also heard of Kelly Noble's troubled upbringing in Ballymun, when both of her parents were drug addicts and she was the victim of and the witness to severe violence.
After Noble's mother left the family home, Noble was enlisted by her father to sell counterfeit drugs to feed his drug habit.
In 2000, when Noble was 14 years old, her father was murdered.
Her mother, Jacqui Noble, is currently serving a life sentence for conspiracy in relation to his death.
Noble was then taken into foster care, afterwards moving to a council house in Laytown, where she lived with her two children, whom she continues to see on a very regular basis.
After the sentencing, Ms McLoughlin's family did not wish to make any comment but their victim impact statements, read out during the previous sentencing hearing, described their trauma.
The dead woman's father, Thomas McLoughlin, described how the loss of his daughter had resulted in a "huge hole" in his heart, "a hole which can never be filled". He said "only the beautiful memories" of her would get him "from day to day". Her mother, Margaret McLoughlin, described the day Emma died as "the worst day" of her life. "Not a day goes by without thinking of her or talking about her. I can never come to terms with the loss," she said.