The international batter is accused of "stealthing" the alleged victim by removing his condom without her knowledge during sexual activity on November 2, 2022 at her eastern suburbs home.
He has pleaded not guilty to one count of sexual intercourse without consent and denies any wrongdoing.
The pair met on Tinder on October 29 that year and met for the first time at the Opera Bar before having pizza in the Sydney CBD and returning by ferry to her home for further drinks.
The woman, who cannot be legally identified, alleged that Gunathilaka forcefully kissed her on ferry's front outdoor deck and slapped her buttocks in a manner she did not like.
CCTV footage shows her chatting and embracing the cricketer on a side outdoor deck and her playfully waving in front of his phone as he films Sydney Harbour.
After they go back inside the cabin to sit down, the footage shows her holding his hands for a long time before getting up to leave.
As the rape trial continued at Sydney's Downing Centre District Court on Tuesday, the woman claimed the forceful kiss and the slap happened on another area of the ferry where there was no CCTV.
"He did slap my buttocks but I don't know at what point it was while we were on the ferry," she said under cross-examination from Gunathilaka's barrister Murugan Thangaraj SC.
She said she may have also breathed on the cricketer's hands to warm them up while they sat together in the cabin.
"This is after you say that he had taken liberty and upset you by slapping your buttocks?" Mr Thangaraj asked.
"Yes," the woman replied.
She admitted she could have asked the cricketer to go home alone at any point, but invited him into her house where she offered him some wine and played the guitar.
While she told police she had stopped playing because Gunathilaka kept filming her without her permission, footage from his phone played to the court shows her playfully batting the camera away.
She appears to stop playing as the song concludes and smiles into the camera.
Mr Thangaraj suggested claimed events after this, including that Gunathilaka pushed her back onto the lounge and pushed his head forcefully into hers actually didn't happen.
He questioned the woman's claims she led the cricketer into the bedroom even after all this allegedly happened.
"You light candles in the bedroom?" he asked.
"Yes," she said.
"After what you say what happened on the couch?" he pressed.
"Yes," she said again.
The trial being heard by Judge Sarah Huggett without a jury continues.
1800 RESPECT (1800 737 732)
National Sexual Abuse and Redress Support Service 1800 211 028
