Jackie Kennedy confronted her psychiatrist about also treating Marilyn Monroe, according to new book

• Jackie Kennedy reportedly shared a psychiatrist with her husband's former lover Marilyn Monroe.
• According to a new book, Jackie confronted Dr. Marianne Kris upon learning she also treated Monroe.

First Lady Jacqueline "Jackie" Kennedy and Marilyn Monroe reportedly shared a psychiatrist, and when Jackie discovered this, she confronted Dr. Marianne Kris for not revealing that she once treated her husband's rumored former lover.

According to "Jackie: Public, Private, Secret," a new biography of the fromer First Lady's life excerpted by People, Jackie began seeing Dr. Kris after former president John F. Kennedy's death. The doctor felt "no responsibility to inform" Jackie about any of her former patients.

Jackie discovered the information on her own, and when she confronted Dr. Kris, she was asked how it was "relevant" to her treatment.

"How is that not relevant?" Kennedy reportedly asked. She was allegedly seeing Dr. Kris to treat PTSD after John's assassination and confront ongoing issues in their marriage that lingered after his death.

John F. Kennedy and Marilyn Monroe's alleged affair is one of the most scandalous pieces of gossip in American history, but it could never actually be confirmed.

In fact, according to Donald Spoto's 2001 biography of Monroe, the pair only met four times between October 1961 and August 1962 outside of the infamous gathering in which Monroe sang "Happy Birthday, Mr. President" to John.

Spoto reported that during one of those meetings, John and Marilyn called one of her friends from a bedroom. The book also states that shortly after that call, Monroe confirmed having "one" sexual encounter with the former president.

In Christopher Anderson's 2013 book "These Few Precious Days: The Final Year of Jack with Jackie," Anderson writes that the relationship was more complex. He wrote of a phone call that allegedly took place between Jackie and Monroe in which the actor told the first lady that John had promised to marry her.

As reported by Vanity Fair, the book reported that Jackie was unfazed and responded, "Marilyn, you'll marry Jack, that's great... and you'll move into the White House and you'll assume the responsibilities of first lady, and I'll move out and you'll have all the problems."

After her alleged affair with John, Monroe was also rumored to have had an affair with his brother, Attorney General Robert F. Kennedy, which the actor's biographer Anthony Summers reportedly confirmed with her former housekeeper, Eunice Murray.

According to Summers, during an interview for the BBC, an emotional Murray asked out loud "Oh, why do I keep covering this up?" When asked what she was talking about, she reportedly replied that "Of course there was an affair with Bobby Kennedy."

Murray also reportedly confirmed that Bobby was with Monroe when she died on August 4, 1962, though her cause of death has officially been ruled an apparent suicide, fueling the conspiracy theory that the Kennedy family was involved in the actor's death.

Monroe's biographer James Spada told People in 2012 that though he doesn't believe the Kennedys were involved in Monroe's death, "it was pretty clear that Marilyn had had sexual relations with both Bobby and Jack."