A 25-year old woman said she accidentally killed a father-of-four, four years ago, after she became very angry with his intellectually disabled son who had interfered with her car.
Claire Nolan of Sheephill Green in Blanchardstown admitted driving her car into Michael Duffy, crushing him to death.
Mr Justice Paul Carney remanded her in custody for sentencing at the Central Criminal Court next week.
Nolan said she "went mental" after she heard that Francis Duffy, a man described as within the "mild range of intellectual disability", had got in and out of her car in the early hours of 26 January 2008.
Nolan was at a party in Wellview Grove in Blanchardstown and had taken cocaine and tablets. She said she was "drunk and off her head on stupid pills".
She attacked Francis Duffy with a baseball bat and he called his father Michael. When he got there, Nolan drove into their garden.
She said she wanted to hit Francis Duffy but had no intention to kill or cause him serious harm. Instead she drove into his father Michael and crushed him to death.
Nolan then left the scene and gardaí found her car, a Nissan Micra, burned out 500 metres away.
Nolan agreed that what she did was grossly reckless and that Michael Duffy was a completely innocent victim.
She told gardaí she was full of "zimmos", cocaine and drink and was "losing her head, losing her temper and couldn't stop driving into the garden".
However, she thought what she did was an accident.
In a victim impact statement today, Michael Duffy's family said the date of his death will haunt them to eternity.
They said that they have been given an emotional life sentence and have been left wondering if he suffered or was frightened as he lay on the cold concrete of a driveway with no one to hold or comfort him.
They said Francis Duffy was a special child and his father had helped him buy the house on Wellview Grove and pay the bills to give him independence.
However, they said he paid the ultimate price for his devotion to his children, that he loved his son and laid down his life for him.
Nolan has 15 previous convictions for possession of cocaine, public order and road traffic offences.
