Shortly before she killed her six-year-old daughter Kiesha, Sydney woman Kristi Abrahams allegedly told her own father she was "sick" of the child and would "hurt" and "kill" her, a court had heard.

But the 30-year-old maintains that she did not intend to murder the little girl, but gave her "a little nudge", which caused her to fall.

Killed her daughter: Kristi Abrahams enters the Supreme Court on Monday morning. Credit:Nick Moir

The revelations came during the first day of Abrahams' sentencing hearing over the July 2010 murder of Kiesha Weippeart, who was killed at her home in Mt Druitt and then dumped in a bushland grave about a week later.

Three years after the murder, on June 17, Abrahams pleaded guilty to the crime.