Constable Alexander James Cox, 30, appeared at Sutherland Local Court on Tuesday, facing one count of recording intimate images without consent and two counts of distributing intimate images without consent.
He has pleaded not guilty to all of the charges.
The court heard Cox was in a sexual relationship with the woman for about four months but that she had never given him permission to film them having sex and did not recall him making any such recordings.
Defence lawyer Paul McGirr described the police investigation as "extremely poor". (Dean Lewins/AAP PHOTOS)
The woman, who cannot be identified for legal reasons, said she was told Cox had shown a video of the couple having sex to colleagues in the police force, who she referred to as "the boys".
"He said he could see my tattoos. He said I was wearing a collar and a leash," the woman told the court.
Cox and the woman had sex on several occasions at his apartment at Engadine, in southern Sydney, during which they had sometimes used a collar and lead that she owned and brought with her, the court was told.
A photograph of the woman having sex with Cox that displayed her "distinctive tattoo" was also allegedly shown by him to another police colleague.
But Cox's lawyer, Paul McGirr, described the police investigation into the allegations as "extremely poor" and no such photos or videos had been retrieved from his client's phone after it was seized.
He also noted the two witnesses who reported being shown the alleged sex video did not initially report seeing the woman's tattoos.
Mr McGirr suggested that any pornographic video Cox showed his colleagues was not of the woman.
"People can't take tattoos on and off," he told the court.
"You cannot see her face and you cannot see Mr Cox.
"One would have to be satisfied … it's not the complainant."
The woman told the court she was not aware of Mr Cox ever taking intimate images of her and the pair had ended their brief relationship on good terms.
"I thought trust was involved," the woman told the court.
The hearing continues.
1800 RESPECT (1800 737 732)
National Sexual Abuse and Redress Support Service 1800 211 028
