A teenage boy who accused his female social worker of having sex with him later told a friend he was lying about the incident, a court has heard.
Alexia Joseph, 30, is on trial before Manukau District Court after denying a charge of having unlawful sexual connection with the then 15-year-old, who she was mentoring at the time.
The defendant had been working as a counsellor for the Waipareira Trust for less than two months when the alleged incident took place in September 2013.
Today, a friend of the complainant - who met the boy at the trust and shared Joseph as a mentor - said his mate seemed "obsessed" with the woman.
"He'd never stop talking about Alexia," the witness told the court.
"He'd text saying he wanted Alexia to be his bi**h."
The boy told the jury his mate initially spoke about a sexual liaison but later changed his story.
The complainant constantly talked about Joseph and bragged about "rooting" her but later denied the tryst had taken place, his friend said.
"He said 'nah, yeah, I was lying'... He said it with a smile on his face," the boy told the court.
The witness admitted he had been huffing petrol during that day and the conversation had come after the pair had shared several pre-mixed bourbon and cokes.
The complainant later texted him urging him not to tell anyone about what they had said.
It is alleged on the day in question Joseph had spent the day at the movies with the complainant before they met his mum for lunch.
Crown prosecutor Evan McCaughan said the women drunk a large amount of alcohol before the defendant dropped the other woman off at home.
It is alleged she and the teenager then drove to the Oakwood Manor motor lodge in Mangere where she enticed him into bed with her.
"As we started kissing each other I felt uncomfortable because she was a bit too old," the boy said during his police interview.
He told police he had repeatedly asked Joseph if she was sure she wanted to have sex and she had reassured him.
"This day still haunts me... f*** it still comes back," he said.
Though the incident only lasted 10 seconds, according to the boy, he had immediately felt uncomfortable and texted his mother, who had earlier been drinking with Joseph.
The defence case concluded this afternoon and the Crown will close its case tomorrow morning.