Kristi Anne Abrahams told undercover police she gave her murdered daughter Kiesha a "little nudge with her foot" causing the six-year-old to hit her head on the end of the bed.
But forensic evidence shows the six-year-old suffered significant trauma to her head, consistent with suffering at least three to five blows, the Supreme Court in Sydney has been told.
Exactly what happened to Kiesha in the last moments of her short life may never be known, with the Crown alleging Abrahams' version of events is inconsistent with the forensic evidence.
Abrahams, 30, who pleaded guilty to the July 2010 murder on the first day of her trial last week, confessed to an undercover police officer that she had given her daughter a nudge with her foot when Kiesha was crying and wouldn't put on her pyjamas.
Kiesha then "jumped" and hit her head on the end of the bed, Abrahams told the officer in April 2011, eight months after she reported her daughter missing.
Kiesha made "weird noises" as Abrahams showered her and her body felt like "jelly", the court heard.
Despite this, Abrahams and her partner, Robert Smith, put her to bed where she was found dead the following morning.
The court has previously heard the couple stuffed her body in a suitcase and kept it in her bedroom for some days.
They then donned disguises, took a taxi to nearby bushland at Shalvey, burned Kiesha's body and buried it in a shallow grave.
They reported her missing on August 1.
On the first day of Abrahams' sentence hearing, crown prosecutor Christopher Maxwell, QC, said the court would hear Abrahams told her father she was "sick" of Kiesha.
"She s***s and pisses in bed," Abrahams allegedly said.
"I'll hurt her, I'll kill her."
Mr Maxwell said the evidence contradicted Abrahams' claim there was a happy family environment in which Kiesha was well cared for and loved.
Forensic dentist, Dr Alain Middleton, told the court Kiesha had suffered fracturing to four of her teeth, consistent with being punched several times in different directions.
The number of "forces" used would have been at least three, and probably more like four to five, he said.
Gasps were heard in court as he said this, while Abrahams remained expressionless in the dock.
The sentencing hearing continues before Justice Ian Harrison.
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