Tiana Savignano, 22, has been accused of hiding information from police relevant to the car crash in which her 20-year-old partner Johnson Kokozian was allegedly behind the wheel.
The SUV he was allegedly driving smashed head-on into a car containing siblings Alina Kauffman, 24, and Ernesto Salazar, 15, killing them both.
Police allege Kokozian fled the scene after crashing the Mercedes-Benz AMG while travelling at nearly double the speed limit for the 50km/h zone.
On Tuesday, Savignano pleaded guilty to filming her boyfriend during a Parramatta Local Court bail hearing on September 3 as he faced one charge of aggravated dangerous driving occasioning death.
She was arrested three days later at Liverpool Local Court when she attended again to support her partner.
The Cecil Park woman will be sentenced over the illegal filming incident on November 27.
Police allege that she, Kokozian and his father discussed a cover story and made false reports to investigators following the crash.
Kokozian's friend Cruz Pamoana Davis-Tuka has also been charged with helping conceal the crime.
Both Davis-Tuka and Savignano will appear at Campbelltown Local Court on November 1, when they will receive the prosecution's brief for charges relating to their alleged concealment of the Heckenberg crash.
Savignano has been slapped with 31 further driving offences unrelated to the deadly crash, including speeding, drink driving, using a mobile phone while driving and having an unrestrained child in a car.
She pleaded not guilty to all these charges at Liverpool Local Court on Monday.
16°C