Jerry Oppenheimer is a New York Times best-selling author who has written biographies of such American political icons including the Kennedys and Clintons. 

Just off Pennsylvania Avenue, a block from the White House then occupied by Bill and Hillary Clinton, was one of America's raunchiest sex clubs for couples only - dedicated to wife-swapping and uninhibited sex with strangers.

One of the club's regulars was Donald Trump's longtime friend and political confidant Roger Stone and his stunning wife, Nydia, who went by the pseudonym 'Nikki.'

A pleasant lunch place and bar during the week for white-collar Washington, D.C. civil servants in the mid-1990s, the place transformed on Saturday nights into a steamy XXX-rated private club aptly named 'Capitol Couples' where the Stones rubbed shoulders and other body parts with a variety of mostly upscale members.

In the jargon of Roger and Nikki's swinging lifestyle, the club was billed as being 'off-premise,' meaning no sex acts were to take place on the premises. With AIDs still rampant, health officials and law enforcement nationwide were cracking down on such sex clubs, and the use of condoms was being enforced. 

But by midnight, the Capitol Couples club had turned into one big orgy, with sex acts openly taking place on the darkened dance floor, in back rooms, and even along the elegant L-shaped bar, with porn videos running in the background on TV sets.

The Stones were card-carrying regulars at Capitol Couples and also at one of the raunchiest sex clubs for couples in New York City, Le Trapeze. 

At the time, Roger Stone, with a long history of working for Presidents Nixon, Reagan, Bush, was acting as an unpaid senior consultant to veteran Kansas Republican politician Bob Dole's unsuccessful presidential campaign. 

Stone had an office at Dole's headquarters and had helped convince Dole to choose the New York politician and one-time professional football player Jack Kemp as his running mate.

Some years later, Dole is best remembered as a TV spokesman for the erectile dysfunction drug Viagra.

Stone's shapely Cuban-American second wife, Nydia, also had platinum conservative political connections. She reportedly served as a personal photographer for President Richard Nixon, and as a photographer in the White House of Ronald Reagan, including for his 1980 presidential election campaign. 

It was while Nydia was photographing a Reagan campaign that she is said to have met her future husband, Roger. Love at first sight, they were married in 1992, in the swinging capital of the world, Las Vegas. They held another ceremony in Washington D.C., which Donald Trump and his then-fiancee Marla Maples attended. 

In 1996, when word leaked out that longtime political consultant Stone, working for the conservative cause of Bob Dole, was actively involved in the swinger lifestyle with his wife, investigative reporters began looking into their involvement.

A freelance journalist for an alternative Washington newspaper, Scott Baranchik, was working on the story undercover in Capitol Couples with his date, another reporter, when they were approached by a couple who identified themselves as Roger and Nikki. Others had also identified the Stones as regulars at the club.

One man claimed that Stone had struck up a conversation with him at a Republican fundraiser on Capitol Hill in the winter of 1994 and asked 'whether my wife and I like to have a good time.' Stone then handed him a photo of Nydia and said, 'Keep it. It has our phone number on the back. If you want to have a good time with us, call us.'

According to the man's account, Stone mentioned that he and his wife had recently been in California and had 'fun' with a member of the U.S. Marine Corps. Stone told him his wife was 'a very attractive lady and that I could have fun with her, too.'

The man passed on the offer.

While the Stones weren't doing anything illegal or criminal as swing club regulars, his activities were viewed as hypocritical and immoral based on the conservative family values that Dole espoused in his campaign, and that Roger Stone advocated as a Dole front man.

Not only were the Stones identified as swing club aficionados, they were also linked to personal advertisements to meet other couples and single men in what was reported as some 70 swinger magazines and at least one website. 

In one such publication, Local Swing Fever, and on a website advertisement paid for using a Stone credit card, the copy read: 'Hot, insatiable lady and her handsome body builder husband, experienced swingers, seek similar couples or exceptional muscular well-hung single men. She's 40DD-24-36; he's 195, trim, blonde, muscular and 8' +. Prefer military, bodybuilders, jocks. No smokers or fats please. Photo and phone required. R&N....We are interested in DC, VA. MD, NYC, Miami, and LA.'

The suggestive photos, which first appeared in The National Enquirer in a September 1996 issue with the headline, 'Top Dole Aide Caught in Group-Sex Ring,' showed Roger Stone naked from the waist up with a black bar over his eyes, presumably to hide his identity. Nydia Stone was photographed in thigh high stockings, with one leg up, and wearing a revealing teddy displaying her ample breasts. In another photo, in which she faces the camera, her breasts are fully exposed, but the Enquirer placed a 'CENSORED' bar across them.

Stone, a longtime adviser to President Trump, was indicted last week on charges of witness tampering, making false statements and obstruction of justice in the ongoing investigation into alleged Trump administration-Russian collusion by special counsel Robert S. Mueller.

FBI agents raided and arrested Stone at his home that he shares with his wife in Florida on Friday morning.