A teenaged girl who allegedly had sex with a married man admitted to text messaging four different teenaged boys over the course of the summer multiple times at late hours of the night.

The defendant, a British national who cannot be named for legal reasons, has pleaded not guilty in Supreme Court to having unlawful carnal knowledge with a girl aged 14 on July 24, July 29 and August 7 last year. He is represented by Elizabeth Christopher.

During her cross examination, Ms Christopher quizzed the girl on her relationship with her father. The girl admitted when she came home for her Easter holiday, their relationship was "very difficult" but said it had improved over the summer.

Ms Christopher also suggested the first alleged sexual encounter took place at a public beach on the 9 Beaches property and not at Long Bay or the private beach next to 9 Beaches. The girl disagreed.

The lawyer suggested the pair had a conversation which made the girl angry and the defendant suggested they leave the beach before it began to rain. The alleged victim said they didn't leave the beach before it rained because they stayed to have sex.

Ms Christopher also pointed out that in her Police statement, the girl did not mention that there was thunder and lightning during the alleged sex and only added it in her story later.

The girl read her statement in court and said she was telling the story to a Police officer, not a friend and it wasn't meant to be an amazing story.

Ms Christopher suggested the girl did not have sex with the defendant on the beach that day to which the alleged victim said she was wrong.

While going over call logs from the girl's cell phone, Ms Christopher pointed out four numbers belonging to four different teenaged boys, who cannot be named for legal reasons.

The girl agreed each number belonged to a different boy and admitted to text messaging and calling each of them at different times throughout the summer multiple times. She also admitted to sending and receiving text messages as late as 1 a.m.

The trial continues on Monday before Puisne Judge Charles-Etta Simmons.