Police prosecutor Tasman Murphy outlined the alleged events leading up to Rylee's death, saying Black, 37, and Hill, 29, had a verbal fight on the way home from dropping Black's three other daughters to school.
The new revelations were aired in Townsville Magistrates Court this morning where Rylee Rose Black's mother, Laura Black, and her partner, Aaron Hill, were granted bail after being charged with manslaughter over the girl's death.
Laura Black seen being led away by police at Townsville University Hospital.
Police were called to the Townsville University Hospital yesterday afternoon after the child's mother found the three-year-old dead in the auto and rushed her to the hospital.
Rylee Rose Black died after being trapped in a auto.
When the couple went inside the home, they are accused of leaving Rylee alone in the auto and binge-watching Netflix show, Shameless.
After hours of binging the popular series, the couple allegedly left home to go and pick up Rylee's three older sisters from school, discovering the three-year-old locked inside.
Barrister for Hill, Claire Grant, said her client had no criminal history and deserved to be granted bail, saying the allegation is "one of an unintentional act". Their next court date is scheduled for February 24.
Rylee Rose Black (right) with her biological father, who is not accused of any wrongdoing.
She leaves behind her loving, devoted and devastated Father Pete and her three older sisters.
"Heartfelt thanks for your donation and words of comfort at this time".
Rylee Rose with her father Pete and her sisters.
The family asked for privacy as they grapple with their loss.
The investigation into the horrific tragedy continues but police but have ruled out drugs or alcohol as a contributor.
Black and Hill had only been dating for a few months when Rylee died.
On Facebook, friends and loved ones rushed to support the couple.
Police believe the child was left in the locked hot auto for most of the day amid soaring temperatures.
On a typical Australian summer day, the temperature inside a parked vehicle can be as much as 30C higher than the outside temperature, meaning the temperature inside Rylee's auto was likely higher than 60C.
'Cars heat up very quickly, and the human body is susceptible to dramatic changes in temperature, ' he said.