Jeffrey Epstein's 'pimp' Ghislaine Maxwell threatened a 15-year-old Swedish girl held hostage on his private island when she refused to have sex, according to bombshell claims made in US court documents.

Rinaldo Rizzo, a butler who worked for hedge fund billionaire Glenn Dubin and his wife, Eva Andersson-Dubin, said in filings for an unrelated case that Epstein and Maxwell brought the teenager with them when they visited his employers in New York.

He said he found the girl crying in the kitchen, and heard her describe her alleged treatment at the hands of Maxwell and her assistant, Sarah Kellen, when she was being held at Epstein's property in the US Virgin Islands.

A butler who worked for hedge fund billionaire Glenn Dubin and his wife, Dr. Eva Andersson-Dubin, (pictured) testified in court that Maxwell once brought a 15-year-old Swedish girl to the Dubins house

He said he found the girl crying in the kitchen, and heard her describe her alleged treatment at the hands of Ghislaine Maxwell (pictured with Jeffrey Epstein) and her assistant, Sarah Kellen

Mr Rizzo claimed the girl told him that Maxwell and Kellen had demanded sex from her and taken away her passport and threatened her when she refused.

According to Mr Rizzo, he introduced himself and his wife to the teenager after Andersson-Dubin stepped out of the kitchen for a few moments.

He said the girl sat in a stool next to a kitchen counter in the Dubins' home. She was 'distraught and shaking...literally quivering'.

He continued in the testimony: 'She proceeded to tell my wife and I… "I was on the island and there was Ghislaine, and there was Sarah," and she said, "They asked me for sex. I said no".'

Mr Rizzo then said: 'She didn't specify who asked for sex. She said they asked for sex.'

According to Mr Rizzo, after the young girl refused to have sex, Kellen took the young girl's phone and passport and gave them to Maxwell.

'And at that point, she said she was threatened,' Rizzo testified.

'And I said, "Threatened?"

'She says, "Yes. I was threatened by Ghislaine, not to discuss this".'

Maxwell (left) and Eva Andersson-Dubin attend an event in New York City in October 2005

Mr Rizzo testified that the girl stopped answering questions once she realized that Andersson-Dubin was heading toward the kitchen.

Mr Rizzo testified that he saw the girl about a month later on board a flight with the Dubin family to Sweden.

The testimony came from a defamation lawsuit brought against Maxwell by alleged sex slave Virginia Roberts Giuffre.

The case was settled in 2017, but 2,000 pages of documents from the proceedings were ordered unsealed on Friday by the U.S. Court of Appeals for the Second Circuit.

Giuffre accused Glenn Dubin of participating in the sex-trafficking ring, according to court documents.

The Dubins have denied these allegations, with a spokesperson for the couple telling DailyMail.com: 'Glenn and Eva Dubin are outraged by the allegations against them in the unsealed court records and categorically reject them.'

Epstein pleaded not guilty to criminal charges of sex trafficking in girls as young as 14, from at least 2002 to 2005. He died in prison in August.

The 15-year-old Swedish girl allegedly told Rizzo that she was held against her will on Epstein's island in the U.S. Virgin Islands after she refused pressure to have sex with men

After Epstein was arrested for sex trafficking, Andersson-Dubin released a statement to The New York Times saying that the allegations 'are completely counter to the person she is familiar with.'

As more details emerged about Epstein's alleged behaviour, the couple released another statement saying: 'The Dubins are horrified by the new allegations against Jeffrey Epstein.

'Had they been aware of the vile and unspeakable conduct described in these new allegations, they would have cut off all ties and certainly never have allowed their children to be in his presence.'

Maxwell and Kellen have been cited in various court documents as 'fixers’ for Epstein but deny any wrongdoing.