A schoolboy "was just laughing" as he shared an explicit video of a former trainee teacher accused of abusing him, a court has heard.
The woman met the teenager when she was 24 and worked as a "prac teacher" for three weeks at his school in 2020 and is now facing a jury trial in the ACT Supreme Court.
Her name and the name of Canberra schools involved in the case are suppressed.
She is fighting numerous charges, including persistant sexual abuse of a child, grooming, and committing an act of indecency on a child, over an alleged "romantic relationship" between the pair.
The woman has also denied making pornographic material available to a young person.
That allegation relates to explicit photos and videos she is said to have sent the teenager at his "urging" when he was 15 years old.
But the woman claims she reasonably believed the alleged victim was in fact 16, as he had told her, being the age of consent in the territory.
On Wednesday, jurors heard evidence from the teenager's brother.
That boy told police the alleged victim showed him an explicit video the woman had sent, in which she appeared to be partly nude and "crawling around like a dog".
"I felt weird watching it," the witness said, claiming he had only watched a few seconds of the video.
Police asked if the alleged victim was doing anything as the video played.
"Nah, he was just laughing," the witness responded.
He also said the alleged victim had shown him a photo of himself and the woman in a changeroom while she wore a "bikini".
"I thought it was pretty odd," the brother said. "He had his hand on her ass."
The trial has previously heard the alleged victim admit he showed explicit videos of the former pre-service teacher to several of his friends and lied about the pair having had sex to seem "cool".
On Wednesday, the witness said his brother would sometimes show him "stacks of cash" he had received from the woman as gifts.
"Sometimes she'd take me to school with my brother," he said.
While the witness described the alleged victim and the woman as "pretty close", he said he did not believe they were more than friends.
However, the witness did say the alleged victim would ask him to lie to their parents about spending time with the woman.
The trial continues.
- Support is available for those who may be distressed. Phone Lifeline 13 11 14; Canberra Rape Crisis Centre 6247 2525; Bravehearts 1800 272 831; Blue Knot Foundation 1300 657 380.
