"You could easily conclude that they didn't treat the complainant as attentively as they should have," Sinclair's barrister Craig Smith SC said on Tuesday.

"Let me make this point clear ... with sensitivity, firmness and respect.

"Consent given at the relevant time but later regretted is still consent."

In his final address to the Wollongong District Court jurors, Mr Smith submitted they would not be satisfied of either the accuracy or the reliability of the complaint's evidence.

Sinclair, 23, and the 29-year-old NRL and NSW State of Origin star have pleaded not guilty to five counts of aggravated sexual assault, saying the early-morning encounter in a North Wollongong unit in December 2018 was consensual.

De Belin's barrister, David Campbell SC, who will continue his address on Wednesday, stressed the "powerful" evidence given about his client's good character and the content of secretly recorded conversations when the accused repeatedly referred to consensual sex.

Mr Smith noted CCTV footage from Mr Crown bar which he said involved dancing with the 19-year-old woman, touching of the breasts and passionate kissing.

"Everyone is entitled to have a good dance, young women and men, and everyone likewise is entitled to be keen on each other," he said.

Her "affection", particularly to Sinclair, and the attraction did not cease or stop, and there was nothing wrong with what she was doing.

"By the time they had left Mr Crown they had hooked up," he said.

It was open for the jury to conclude that each of the three knew they weren't going onto another club, but somewhere else.

Footage of their ride in a tuk-tuk after leaving the bar showed it to be "a happy time", not the "angry" time described by the woman.

"The complainant's evidence was the whole reason they were leaving town was effectively so the two boys could charge their phones," he said.

But he asked if it made sense that two men who had been on a Santa pub crawl would go home to do that or even to change their clothes.

"Or does it make more sense that three people are going somewhere together consensually?" he asked.

Referring to telephone intercepts, he submitted they wouldn't have known they were being recorded.

"Every time there is mention of sexual activity it is consensual sexual activity," he said.

"You might think in the telephone intercepts, there is utter disbelief of the suggestion of a sexual assault."

Prosecutor David Scully earlier alleged that de Belin expected he could do whatever he wanted to the woman, who said she had gone to the bathroom in the unit when he walked in with no clothes on.

"He expected when he walked around naked it would inevitably lead to sex," he said.

"He formed the view it was going to happen whether the complainant liked it or not.

"He took that sex by force ladies and gentlemen."

Mr Scully said de Belin's version of events given to the jury was that permission was sought for every movement between the three of them.

"You might think that in creating what the Crown says was a fake version of events, they just went too far," he said.

"The version they gave just sounds inherently implausible."

Australian Associated Press