The mother of John Banks' alleged love child is relieved her affidavit alleging the former cabinet minister and mayor tried to convince her to have an abortion and lie about the son's birth father, is now in the public arena.

"It's all out there now," Antony Shaw's mother, Pam Mayes told the Herald.

"Hopefully after the judge's decision it'll all settle down - that's how I feel".

Three months ago, Shaw, 47, asked a judge to declare that the former politician known as "Banksy" was his biological father.

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The court action arose after years of uncertainty around the identity of his father.

Mayes, aged 69, is struggling to understand why Banks hasn't responded to the claims both inside and out of court.

"I said this to my lawyer, why isn't he fighting this? He seems to fight everything else".

Mayes said she had not heard from Banks since the contents of her affidavit were released, something she was not surprised by.

"I don't expect Banks to contact me, not at this stage. What can he do or say now?," she said.

"What's done is done isn't it?"

She said the latest court saga was "disturbing", bringing back many bad memories.

She added: "Every child has the right to know who their parents are."

She was surprised to learn this week, her son tracked Banks down in an Auckland court house. Banks allegedly was reluctant to talk to him.

Mayes claims she met Banks in the late 1960s. He was a travelling sales rep for Pfizer, a drugs company. She was a nurse at Waikato hospital.

The pair first met at a party, she has claimed.

Mayes told the Herald the relationship ended when she found out she was pregnant.

On Wednesday, the High Court at Auckland heard allegations that Banks tried to convince her to abort her unborn child, and also allegedly told the woman to pretend another man was its father.

The court also heard claims Banks supplied drugs to make her miscarry. She refused to take the pills.

But the pair continued seeing each other "on and off" for two years after Antony was born, she told the Herald.

In a previous interview with the Herald, Mayes said: "He was my first love, that's why it was really hard".

For many years Shaw grew up believing a Chinese man named Harry, a former boyfriend of his mother's, was his father.

He was brought up by Mayes and her husband Tony.

But Shaw, who has a 19-year old son, was always confused by his non-Chinese features and was bullied at school.

Mayes finally told Shaw about his biological dad after Banks revealed publicly the impact of not having a relationship with his own father in his Parliamentary valedictory speech in October 1999.

The next year Antony - an English teacher living in Japan - travelled back to New Zealand to meet the man he was told was his biological dad.

But the meeting never happened, Mayes said, something which had severely impacted on her relationship with her son.

On Friday, Banks' estranged wife Amanda, now a pharmacist living in Central Otago, told the Herald she did not want to talk about the court case or Mayes' affidavit.

"We [Banks and I] have talked about it, but it's private," she said.

"It's none of my business, it was a while before I my time and obviously it's for him [Banks] to know and for her [Mayes] to know. But of course, I support him."

In July she told the Herald that she remembered Shaw visiting the Banks' then family home in Paritai Dr in 1999.

At the time she believed it was totally up to Banks whether or not he took a DNA test.

"It was a long time ago. I mean feel for both of them, it's not an easy situation".

Banks has refused to engage with the court proceedings or respond to repeated requests for comment on the case - including calls made by the Herald on Friday.

Justice Patricia Courtney has reserved her decision on the paternity claim.