Naked ambition: Scottish fiancée of Trump's new Treasury Secretary appears in steamy shower and sex scenes in her latest movie

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Donald Trump's new Treasury Secretary is definitely a man who knows his numbers and his figures, as his glamorous fiancée proved without a doubt last week in the Oval Office.

While the President watched approvingly, Steve Mnuchin was sworn in alongside Scottish-born actress Louise Linton, 35, who revealed almost all in her latest movie, Intruder.

Stripping down for a steamy shower scene and bedroom romp, Linton achieved a level of notoriety last year when it was alleged she fabricated her experiences in Africa for her memoir.

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Creepy: Louise Linton appears in a trailer for her 2016 movie Intruder - about a terrifying home invasion 

Steamy: The movie was produced by Linton and also starred musician Moby (who is not pictured) 

Psychological: The movie was released and distributed by IFC Midnight in the United States 

She has also starred alongside Tom Cruise and Robert Redford in minor roles during her rise to fame.

Worth $400m, Mnuchin, 54, is the wealthiest man to ever hold the Secretary Of Treasury position and the former banker and movie producer has been criticized for working on Wall Street during the 2008 financial crisis.

It's claimed it makes him unfit to hold such a prominent position in the new administration. 

He is an experienced movie producer whose most recent credit was as executive producer of The Lego Batman Movie.

His beautiful wife-to-be starred alongside musician Moby in Intruder, a 2016 psychological thriller about a woman home alone while her husband flies on a business trip to Japan.

Indeed, her co-star Moby is an outspoken critic of Trump and last week said that he has seen secret intelligence which proves the president is being blackmailed by Russia.

Solemn duty: U.S. Vice President Mike Pence, right, swears-in Steven Mnuchin, U.S. Treasury secretary, (second left), as his fiancee Louise Linton, (second right), and U.S. President Donald Trump listen during a ceremony inside the Oval Office of the White House in Washington last week

Espionage claims: Moby alongside Linton has said he has proof President Trump is colluding with the Russians

The musician claims he learned the details after 'spending the weekend talking to friends who work in DC'.

Linton meanwhile, held the bible for Mnuchin as he was sworn into office and his financial acumen has been praised by Trump and other Republicans in Congress.

Late last year, Linton was attacked for her memoir and allegedly making up a near death experience in Africa she says she experienced when she was an 18-year-old volunteer in Zambia in 1999.

She described how her 'dream gap year' turned into a 'nightmare' when she had to flee armed rebels from the nearby Democratic Republic of Congo.

But an extract of the book that was published online, provoked an angry reaction from Zambians, who took to social media to claim that her story is untrue, with one blasting her by saying 'the only thing missing is Tarzan and Mowgli'.

Style: Louise Linton (left in 2015) at  Vanity Fair party and in 2016 with Steve Mnuchin at the New York Public Library

The book, In Congo's Shadow, is billed as 'the inspiring memoir of an intrepid teenager who abandoned her privileged life in Scotland'.

It is further claimed to be 'a tale of lost innocence and one daring young girl's bittersweet journey to the heart of Africa', where she writes about how she was terrified of what the rebels from Congo 'would do to the "skinny white muzungu with long angel hair"'.

Gala: Steven Mnuchin, Louise Linton at the Chairman's Global Dinner in Washington DC last month

In her book, the actress also wrote: 'I had come to Africa with hopes of helping some of the world's poorest people.

'But my gap year had become a living nightmare when I inadvertently found myself caught up in the fringes of the Congolese War.

'I witnessed random acts of violence, contracted malaria and had close encounters with lions, elephants, crocodiles and snakes.'

But since the story emerged following her fiance's new appointment, her agent Mike Sitrick told the Hollywood Reporter that Linton was targeted unfairly. 

He added: 'Had her critics checked, they would have found that articles written contemporaneously with the events reported in Louise's book, by among the most respected media in the world, were consistent with Louise's reporting of those events, as was a United Nations High Commissioner for Refugees briefing in March 1999.'

Linton was born and grew up in the Scottish capital Edinburgh and spent her teenage years living at the family home, Melville Castle in the nearby town of Dalkeith.

After boarding at Fettes College, she spent part of her gap year in Zambia and also trained with the The London Academy of Music and Dramatic Arts.

She then attended Pepperdine University in California to study journalism and later gained a law degree while waiting for her green card.

Honor: Steve Mnuchin signs a document in front of U.S. President Donald Trump (right), Vice President Mike Pence and his fiancee Louise Linton after being sworn in as Treasury Secretary

Linton then began to pursue her career as an actress and she gained minor roles in shows such as CSI:NY.

Her big break when she landed a role in the drama movie Lions for Lambs alongside Robert Redford, Tom Cruise and Meryl Streep.

She has also appeared in several horror movies and her first lead role was in the film Intruder.

It is believed she first met her husband-to-be while serving on the committee of environmental non-profit group Conservation International’s Los Angeles gala.

They have since been pictured together at a number of glitzy events and are believed to have become engaged this summer and live in Bel Air.

Mnuchin meanwhile divorced his second wife Heather deForest Crosby in 2014, with whom he had three children.

The pair married in 1999 in New York and before they split, they were regarded as a high powered couple in the world of philanthropy in both New York and Los Angeles, attending star-studded galas.