An alleged kidnapping victim - rescued after waving through a hole in her own car boot - was detained for 13 hours, a court has been told.
The woman, 24, was found covered in stab wounds in the boot of her Holden sedan after it was pulled over on the Hume Highway at Berrima, south of Sydney, on Wednesday.
Police had been alerted to the woman's predicament 20 minutes earlier when a driver 40 kilometres north of Berrima saw a hand through the rear tail-light section of the car boot.
She was taken to Liverpool Hospital and treated for non-life-threatening injuries.
Two other women in the car - Kayley Lee Ketley, 24, and Latia Henderson, 18 - were both arrested and faced Picton Local Court on Thursday.
Both were remanded in custody until April 7 in Campbelltown Local Court to allow the prosecution to service the brief of evidence.
Ketley made an unsuccessful application for release after a magistrate reminded her she faced "very, very serious" charges.
According to the charge sheets, Ketley and Henderson detained the 24-year-old woman in Claymore on Tuesday evening with intent to use her car.
Both accused kidnappers allegedly wounded the victim between 10.30pm and their arrest on the Hume Highway 13 hours later.
The pair are both charged with wounding with intent to cause grievous bodily harm, taking/detaining in company with intent to get advantage and occasioning actual bodily harm, a car theft offence and a driving offence.
Ketley also faces a drug possession charge after allegedly being found with cannabis.
The 24-year-old failed to convince magistrate Mark Douglass she deserved release after appearing before him on Thursday afternoon.
Wearing a white forensic jumpsuit and appearing via video link from a holding cell, the Macquarie Fields woman was warned the offences she faced meant the onus was on her to show why she should be released.
"They are very, very serious offences. Do you appreciate that?" the magistrate asked.
"I understand," Ketley replied.
"You do have a right against self-incrimination and, in my view, you ought to carefully consider (whether to apply for bail) without first getting some sort of legal advice," Mr Douglass said.
Ketley persevered, telling the court her grandmother was very ill with dementia and recovering from two knee reconstructions.
She offered to live at her grandmother's residence and report twice daily to police while on bail.
"I would do whatever I had to do," Ketley said.
Mr Douglass refused bail, saying her reasons did not reach the level of her showing cause.
"Please obtain some legal advice," he told Ketley after she asked what would show cause.
Henderson also appeared via video link from a holding cell, only speaking to confirm she could hear the court.
Outside court, the Campbelltown teenager's solicitor said a bail application may be made at a later date.
"Obviously (she's distressed). It's quite clear that anyone in this position, they're going to be quite distressed," lawyer Gazi Abbas told reporters.
Mr Abbas said he'd not yet received instructions about whether Henderson planned to defend the charges.