Joseph dropped off the other woman at home and continued with the teen to Oakwood Manor motor lodge in Mangere where she booked a large studio room.
The boy says she persuaded him to join her in bed and the pair had sex.
Joseph's lawyer accepted his client had spent the night with the complainant at the motel but there was nothing more to it.
"It was an extremely poor series of decisions but it doesn't mean she had sex with [him] on that night," Mr Pati said.
There were also allegations Joseph inappropriately touched her mentee while they were at the cinema together, earlier that day.
"Nothing inappropriate, sinister or remotely sexual happened during the movies," Mr Pati said.
The teenager told police during a video interview that "it felt like she was going to rape me" but the defence lawyer said that version of events was "absolutely ridiculous".
Crown prosecutor Evan McCaughan, during his closing today, drew the jurors' attention to text messages between Joseph and the boy.
At one point she told him she would give him "a big juicy kiss and a hug" and that she would probably be sacked if she told him how she truly felt.
The defence again conceded they painted a very negative picture but stressed Joseph's inexperience as a counsellor.
"She is new to her job," Mr Pati said. "It's a job in south Auckland; this is tough. Let's be realistic about south Auckland, it's tough.
"Are the text messages inappropriate? Absolutely. She's new, she's busy, she's overloaded, but she's naive."
He told the jury the teenager had simply told a lie and been forced to follow through with it once the police became involved.
Judge Gerard Winter will sum up the case this afternoon before the jury begins deliberation.
