Dozens of people packed into a Sydney court to show their support for three women linked to a performing arts school in regional New South Wales and accused of sexually abusing three young boys.

Therese Ann Cook, 58, Yyani Cook-Williams, 30, and Clarissa Meredith, 23, appeared via video link from Silverwater Women's Correctional Centre for a bail application hearing.

Many of the trio's supporters, some of whom could not fit in the courtroom, cried when they appeared in court.

The three women, along with Paul Cook, 52, and three others who cannot be named for legal reasons, are charged with a total of 127 offences relating to the abuse of the boys between 2014 and 2016.

They were refused bail.

In handing down her decision, Magistrate Susan McIntyre said "given the gravity and often bizarre nature" of the allegations, one would expect some physical evidence.

But she said it was unusual for sexual assault allegations, particularly involving young children, to be anything but word-on-word.

"Alleged implements used within the sexual assault scenarios were found within the home — that being needles, bowls and implements and other sporting equipment that was used in specific ways," Magistrate McIntyre said.

"It may be that it is mere coincidence [because they are everyday items] … however they are certainly issues that will bear weight as the prosecution case goes along."

The three boys were known to the accused, and court documents state that at the time of the abuse one of the boys was aged seven, another turned four during that period and the youngest was no older than two.

"I do note for the record, all the people sitting in the back ... are all both friends and family of the accused and it's merely to demonstrate they have strong community ties and they're willing to support [them] in these difficult circumstances," defence lawyer Bryan Wrench said.

Mr Wrench said allegations that the accused had stuck needles in the eyes of the boys, bitten their tongues, whipped them and cut them had no medical evidence backing them up.

He also added that another allegation that one of the accused lifted a boy up by his penis was deemed to be impossible in one of the expert reports.

Videos played to court

Mr Wrench showed the court two videos of two of the alleged victims playing with Ms Cook and Ms Cook-Williams in a park.

In one of the videos, Ms Cook hands the camera to one of the boys to film.

He giggles saying: "That's awesome ... that does look weird" as Ms Cook helps the other boy on a flying fox.

In the other video, Ms Cook-Williams is behind the camera as the boys play.

"The video captured of Ms Yyani Cook-[Williams] is said to be at the time of one of the allegations," Mr Wrench said.

"The video we have does not show any sexual abuse ... It shows the child in a loving warm relationship at that stage."

Mr Wrench said the women had cooperated with police throughout the investigation, including providing them with videos and pictures, and pointing them to electronic devices when premises were searched.

Prosecutor Ciro Triscari told the court there were at least 17 different incidents in the police brief and the prosecution case was strong.

"The crown accepts these cases of course are word on word, but nearly all allegations of sexual abuse are word on word," he said.

Mr Triscari told the court police had evidence confirming the accused were at the locations of the different alleged incidents.

He continued saying the videos of the boys playing in fact strengthened the case as they proved the accused were with the boys on those days.

Magistrate McIntyre said the accused could be facing life sentences if eventually convicted.

Outside court, Therese Cook's husband David Williams was among the 30-odd supporters who attended the bail application hearing.

"[We] all believe everybody is innocent, we continue to believe that," he said.

Mr Wrench said he would be appealing the bail decision to the Supreme Court, and would be applying for bail for the other accused.