An explosive book claims that John F. Kennedy took the virginity of a White House intern in a side room, just feet away from where administration staff were drinking at an after-work party.

Mimi Alford, now 69, told how former president John F. Kennedy led her into “Mrs. Kennedy’s room” during a personal tour, where he proceeded to have sex with her.

Mimi Alford, a retired New York church administrator and grandmother, also revealed in her tell-all memoir details how, during a passionate 18-month affair with the commander-in-chief, he told her to perform a sex act on his friend as he watched.

She also claims the then 45-year-old president also stuffed party-drug amyl nitrate, more commonly known as poppers, under her nose after telling her it would enhance their sex life.

But during their romance, Mimi Alford said JFK never properly kissed her and that she was often forced to play “a waiting game” as to when she would see him.

John F. Kennedy led the former intern into “Mrs. Kennedy’s room” during a personal tour, where he proceeded to have sex with her, Mimi Alford claims

Mimi Alford’s book “Once Upon a Secret: My Affair with President John F. Kennedy and Its Aftermath” tells the story of when the 19-year-old debutante from New Jersey landed a job in the White House press office.

It was just four days into her internship that Mimi Alford was invited for a midday swim in the White House pool, where JFK exercised to ease his chronic back pain, and where they spoke briefly.

Later that day, Mimi Alford was invited by his best friend Dave Powers to an after-work party, it was reported in The New York Post.

After drinking several cocktails, JFK took her on a “personal tour”, where she says he moved “closer and closer” until he was standing above her, guiding her onto the edge of a bed.

Mimi Alford wrote in the book: “Slowly, he unbuttoned the top of my shirtdress and touched my breasts. Then he reached up between my legs and started to pull off my underwear.

“I finished unbuttoning my shirtdress and let it fall off my shoulders.”

Mimi Alford said John F. Kennedy pulled down his trousers, but kept his shirt on, and paused when he noticed she seemed reluctant.

He asked her if she had done this before and she initially replied “No” but then changed her mind and said “Yes”.

After intercourse, Mimi Alford said: “He hitched up his pants and smiled at me.” She claims he pointed her to the bathroom and went back to the West Sitting Hall where they had met.

She said: “I was in shock. He, on the other hand, was matter-of-fact, and acted as if what had just occurred was the most natural thing in the world. On the ride home, it kept echoing in my head: I’m not a virgin anymore.”

Mimi Alford's book “Once Upon a Secret: My Affair with President John F. Kennedy and Its Aftermath” tells the story of when the 19-year-old debutante from New Jersey landed a job in the White House press office

Mimi Alford said she went swimming with him again the next week and, although he “barely acknowledged” her arrival, they later ended up in another bedroom which was, she says, the start of the affair.

She said: “The fact that I was being desired by the most famous and powerful man in America only amplified my feelings to the point where resistance was out of the question. That’s why I didn’t say no to the president. It’s the best answer I can give.”

Mimi Alford, who ironically went to the same Miss Porter’s school as JFK’s wife Jackie, described the former president as “playful”, the sex as “varied and fun” and said he could be “seductive and playful”.

She said they spent a lot of time “taking baths” and that if they spent the night together, she would wear his own soft-blue cotton nightshirts.

But Mimi Alford also revealed complications in the relationship, saying they never kissed, and that she was often subjected to a “waiting game” where she was told to stay in her hotel until he called for her.

There is also a dark undertone to some of JFK’s actions in the book, such as when he “forced” her to sniff amyl nitrate, commonly known as poppers, during a Hollywood party at Bing Crosby’s desert ranch.

Mimi Alford said: “I was sitting next to him in the living room when a handful of yellow capsules – most likely amyl nitrate, commonly known as poppers – was offered up by one of the guests.

“The president asked me if I wanted to try the drug, which stimulated the heart but also purportedly enhanced sex.

“I said no, but he just went ahead and popped the capsule and held it under my nose. He didn’t try it himself. This was a new sensation, and it frightened me. I panicked and ran crying from the room.”

Mimi Alford also tells of how JFK asked her to “take care” of his friends Powers who “looked a little tense” while they were swimming in the White House pool.

“It was a dare, but I knew exactly what he meant. This was a challenge to give Dave Powers oral sex. I don’t think the president thought I’d do it, but I’m ashamed to say that I did… The president silently watched,” she said.

During the October 1962 Cuban Missile Crisis, where the U.S. and USSR had a nuclear stand-off, JFK reportedly told Mimi Alford that: “I’d rather my children red than dead.”

Mimi Alford, then Mimi Beardsley, also tells of how she erroneously believed at one point she was pregnant with JFK’s child, and another moment of when her lover reached out to her following the death of his infant son Patrick Bouvier Kennedy.

Mimi Alford wrote: “I had never seen real grief in my relatively short life. He invited me upstairs, and we sat outside on the balcony in the soft summer evening air. There was a stack of condolence letters on the floor next to his chair, and he picked each one up and read it aloud to me… Occasionally, tears rolling down his cheeks, he would write something on one of the letters, probably notes for a reply. But mostly he just read them and cried. I did, too.”

She said she saw President John F. Kennedy for the final time at The Carlyle hotel in Manhattan on November 15, 1963, just a week before his assassination in Dallas.

At this point Mimi Alford was due to be married to her college sweetheart, Tony Fahnestock.

“He took me in his arms for a long embrace and said, <<I wish you were coming with me to Texas>>. And then he added, <<I’ll call you when I get back>>. I was overcome with sudden sadness. <<Remember, Mr. President, I’m getting married>>.

“<<I know that>>, he said, and shrugged. <<But I’ll call you anyway>>.”