(NewsNation) — A new biography on former President John F. Kennedy will reportedly reveal a relationship that Kennedy had with a flight attendant he met in 1956, according to People.

“JFK: Public, Private, Secret” by J. Randy Taraborrelli claims that Joan Lundberg met Kennedy when he was a Massachusetts senator and married to Jackie Kennedy. Lundberg’s family, including her son Zachary Hitchcock, recently shared her unpublished memoir and personal diaries with Taraborrelli, according to People.

“She was unconventional and independent — a voluptuous beauty with a great smile,” Hitchcock said.

This biography will be a follow-up to Taraborrelli’s 2023 book, “Jackie: Public, Private Secret.” In his latest work, he will tell Lundberg’s story for the first time. He said, “With this book, I wanted not to defend JFK, but I wanted to explain him.”

He also said, “Joan was a big revelation for me. She acted as his [Kennedy’s] therapist in many ways. Because she was outside of his Washington circle, he opened up to her — and began to reckon with his flaws.”

An excerpt that was shared with People gave a look into Taraborrelli’s latest biography. In the excerpt, readers learn more about Joan and Kennedy’s supposed relationship, including when Kennedy claimed that his family was against him because he wasn’t there for Jackie Kennedy after their daughter’s stillbirth.

The excerpt read, “He admitted that ‘We Kennedys aren’t the best at expressing emotion.’ Joan told him, ‘I’ll bet that’s the great excuse of your life.’ Joan asked him if he’d grown to love his wife. He hesitated. ‘I don’t know that I love anything,’ was his answer. That can’t be true, she said. After a moment, he added, ‘I love politics. I don’t know how to love anything else.'”

Jackie Kennedy allegedly offered money to stay in marriage with JFK

The biography also revealed that Kennedy and his wife, Jackie Kennedy, almost got divorced. Kennedy’s father, Joe Kennedy, allegedly received a call from a New York attorney who was representing Jackie Kennedy. She reportedly was the one who wanted the divorce.

The excerpt claimed, “Joe told Jackie that if she agreed to stay in the marriage he could give her the freedom to do whatever she liked. He would offer her $100,000 upon the birth of her and Jack’s first child.”

Jackie Kennedy reportedly accepted that offer, but years later, when talking with architect John Carl Warnecke, the biography claims that, “Warnecke recalled, ‘She told me things changed for her when Jack became involved with Joan but that it wasn’t a subject she wanted to get into. It was very painful, that much I knew.'”

JFK reportedly continued affair despite being contender for presidency

The biography also claims that, by 1957, Kennedy had been seen as a contender for the presidency. However, he still continued his affair with Lundberg, flying her around on different airlines and covering expenses for her.

One part of the biography says, “One night in May Jack and Joan were sharing a cigarette in bed when he suddenly asked her, ‘Tell me the truth, Joan. Do you think Jackie is screwing other guys?’ He explained that Jackie was ‘so great,’ he couldn’t imagine her not having someone else in her life.”

It also said, “At the beginning of the year, he said, they’d started having sex now and again, but ‘there’s too much left unspoken between us.’ Recently after having sex, she’d asked him, ‘What you do with me in bed, is that what she likes?’ obviously meaning Joan. He could see the ‘damage in her eyes,’ he said, ‘and it killed me.'”

Lundberg reportedly noticed a change in Kennedy after Jackie Kennedy gave birth to Caroline at the end of November. The excerpt says, “She later wrote: ‘I think I was now very much in love, and I was so mad at myself because I knew better. I knew better!’ While Jack and Joan would again share their bed in Minneapolis on April 25 and 26, 1958, things were definitely different.”

Flight attendant allegedly tells JFK she is pregnant

Lundberg eventually had to call Kennedy to reveal that she was pregnant, according to the biography. The excerpt read, “When he asked her how she felt about the pregnancy, she said she loved the two children she was raising on her own and knew she’d also love any child she and Jack brought into the world. He didn’t know how to respond.”

Then, later that summer, Kennedy allegedly called Lundberg and told her to abort the pregnancy, according to the biography.

“He told her, ‘You’ll know what to do, Joan. Please,’ he said, his tone desperate. ‘Being a politician is who I am,’ he told her. ‘Politics is all I know. If you take that away . . .’ His voice trailed off. Before she could respond, he disconnected the line.”

When she received an envelope with no money, Kennedy was upset and wired more money the same day, with Lundberg getting an abortion a day later, the book claimed.

“‘From what she later told me, Mom realized the party was over,’ said Zachary Hitchcock in 2024. “‘She couldn’t be on the sidelines. The presidency, Jackie, the abortion, there was no way mother could be marginalized in that way. She had way too much pride.'”

Kennedy’s affair allegedly ended over the phone

The biography also claims that Kennedy had called Lundberg to check on her, which is when she told him, “I’m going to need to put some distance between us.” She also reportedly said, “You love Caroline, and I know that, but I’m somebody’s daughter, too. Remember that the next time you treat a woman the way you’ve treated me.”

Kennedy became the nation’s 35th president, and his relationship with Lundberg was never revealed. However, it is claimed that his wife had a spy who would tell her about any suspicious calls that came through.

An excerpt from the book reads, “From all available evidence, Jackie never found out about the abortion, either. Many years later, she told a family member, ‘I was doing my best with the cards I’d been dealt. I loved Jack. I know he loved me. I had to ignore the rest of it. My marriage was like a deep black hole and I knew if I looked down, I’d fall in.'”

JFK, Jackie Kennedy planned to renew their vows after son’s death

Kennedy’s son, Patrick, died on Aug. 9, 1963, two days after he was born prematurely, according to People. The book claims that Jackie Kennedy then decided to go to Dallas with the president that November. The book reads, “A couple of months earlier, at the celebration of their tenth wedding anniversary, Jackie and Jack gave each other gifts. She presented him with a new St. Christopher’s medal because he’d placed his own in Patrick’s coffin.”

It goes on to say, “In turn, he gave her a gold-and-emerald ring, which represented the fighting spirit of the Irish he’d seen in their son’s fight for survival. He slipped it onto Jackie’s finger next to her wedding band and asked her to marry him. There’d never been a real proposal, except for a few words in an airport when she returned from her trip to England in 1953. Jack was a different man.”

Kennedy and his wife had allegedly planned to renew their vows in September 1964 at Hammersmith, but it never happened. Kennedy was assassinated on that trip to Dallas on November 22, 1963, during a motorcade.

“Joan [who had married Freemont Hitchcock in 1963] was devastated by the assassination. She wrote: ‘When the truth struck home, I closed my bedroom curtains and shades, and I cried, screamed, and cursed alone for hours,'” the book reads.