TVNZ's Close Up show reported last night that former All Black manager Mike Banks was called in to investigate the allegations, and that Brooke later paid $1500 to a female witness.
Robin Brooke did not return calls last night.
Close Up also reported Brooke did not respond to the claims.
The allegations come months after it was reported that Brooke groped a 15-year-old Auckland girl at a Fijian resort on New Year's Eve.
He also allegedly assaulted her 17-year-old male friend, who came to her aid.
In February, Brooke, who is 43 and who played in 62 tests for the All Blacks, publicly apologised to the families involved, as well as to the New Zealand public.
He paid a financial settlement to the families and said he had not engaged in any similar behaviour before.
The incident reported last night allegedly took place a year after the woman first met Brooke in July 1997, when the pair had consensual sex.
She was 17 and he was 30 and had been married for eight months, Close Up reported.
Brooke and his wife, Hayley, now have four children.
A year later, the woman and a friend went to a bar, hoping to meet All Blacks after a test.
"Robin caught my eye ... then a few minutes later he came over and said 'You girls want some drinks'," the woman told Close Up. The woman's friend told Close Up: "He bought us Chartreuse. I don't remember the amount of shots that he bought us, but it was shot, after shot, after shot."
The liqueur is 55% alcohol.
The trio ended up at the friend's house, where she says she woke up in the middle of the night, naked, to find Brooke having sex with her friend, who was comatose on the bed.
"I was just completely disgusted with the situation," the friend said.
"And then, when I looked, he was on top of my friend, having sex with my friend ... I tried to push him off but he would not get off."
The alleged victim said she woke up "sick to my gut" with someone having sex with her.
"I didn't want it. I was passed out, wasted and he was using my body like he had a right to my body," she told Close Up.
The friend said she repeatedly told Brooke to stop what he was doing.
A third friend entered the room and told him to stop but he allegedly continued.
It was not until she was on the phone to police, telling the operator that "Robin Brooke is at my house ..." that he apologised repeatedly and told her he was leaving.
Former All Blacks manager Mike Banks also appeared on the programme, confirming that the New Zealand Rugby Union had received a letter of complaint from the victim's friend.
Included in the envelope were some of Brooke's personal items, including socks he had been wearing and a credit card.
Mr Banks said the matter had been dealt with "internally" at the time.
He said he recalled Brooke being hugely remorseful.
"It needed to be investigated and it was and I believe it came to a satisfactory conclusion."
The female "witness" said the rugby union offered counselling but it never eventuated and life became a downward spiral as a result.
"I was really behind in my rent and so I remember Mike said if there's anything that we need, I should call him.
I wanted some kind of compensation and so I rang him up and he accused me of blackmail and then said, `Well fine, then you have to talk to Robin Brooke about this'.
"Robin called ... He asked me how much I wanted and then he bargained with me and he said $1500, so I just accepted."
TVNZ last night said it had sworn affidavits from three people in the house at the time of the alleged incident.
