23rd June 1948: Lord Louis Mountbatten , the last Governor General from Britain waving a cheery farewell to the crowds in Delhi

23rd June 1948: Lord Louis Mountbatten , the last Governor General from Britain waving a cheery farewell to the crowds in DelhiPhoto by Keystone/Getty Images

Lord Mountbatten, Prince Philip's uncle, had a scandalous marriage, new biography reveals

A biography about Lord Louis Mountbatten reveals that the British royal who was killed by the IRA in 1979 was “devastated” by his wife Edwina's affairs during his lifetime.

In his book The Mountbattens: Their Lives and Loves, British historian Andrew Lownie reveals that the famous couple eventually agreed upon an open marriage, fearing the shame they would incur if they chose to divorce.

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Admiral of the Fleet Lord Louis Mountbatten (1900 -1979) at the Ministry of Defence, London, after his retirement from the office of Chief of the Defence Staff, 15th July 1965. (Photo by Keystone/Hulton Archive/Getty Images)

Admiral of the Fleet Lord Louis Mountbatten (1900 -1979) at the Ministry of Defence, London, after his retirement from the office of Chief of the Defence Staff, 15th July 1965. (Photo by Keystone/Hulton Archive/Getty Images)

In 1922, Lord Mountbatten married Edwina, who was considered among the most beautiful people in England at the time. The duo would go on to endure a marriage that was marked with a series of affairs, with Edwina, who was described as “sex obsessed,” engaging in as many as 18 trysts.

According to Lownie, Lord Mountbatten once said: “Edwina and I spent all our married lives getting into other people's beds.”

Lownie's book also cites a letter he wrote to his wife that said: “I wish I knew how to flirt with other women, and especially with my wife.”

“I wish I had sown many more wild oats in my youth, and could excite you more than I fear I do.”

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As Edwina became a hot topic in the press, as did her affairs. Lord Mountbatten and his wife eventually agreed upon an open marriage, in order to spare themselves the shame of a divorce.

The couple’s daughter Pamela said: “When my father first heard that she had taken a lover, he was devastated.”

“But eventually, using their reserves of deep mutual affection, my parents managed to negotiate a way through this crisis and found a modus vivendi (way of life).”

Recalling the nature of her mother’s behavior, the couple’s daughter Pamela once revealed: “When my mother returned from shopping one day she was met with ‘Mr. Larry Gray is in the drawing-room, Mr. Sandford is in the library, Mr. Ted Phillips is in the boudoir, Señor Portago [is] in the anteroom and I don't know what to do with Mr. Molyneux.’”

Lord Louis Mountbatten (1990 - 1979) of Burma, the last Viceroy of India and overseer of the partition of India into India and Pakistan, with his wife and Mohammed Ali Jinnah, Leader of the All India Muslim League, after talks at the Viceroy's House, New Delhi, India, (9th April 1947. (Photo by Keystone/Hulton Archive/Getty Images)

Lord Louis Mountbatten (1990 - 1979) of Burma, the last Viceroy of India and overseer of the partition of India into India and Pakistan, with his wife and Mohammed Ali Jinnah, Leader of the All India Muslim League, after talks at the Viceroy's House, New Delhi, India, (9th April 1947. (Photo by Keystone/Hulton Archive/Getty Images)

In 1932, after they agreed upon their 'open marriage,' Edwina was rumored to have been engaging with an affair with West Indian cabaret singer and pianist, Leslie ‘Hutch’ Hutchinson, at the London hotspot Quaglino’s. Given the time period, it would have been the pinnacle of scandal for a woman of Edwina’s status to be engaging with a black man.

Distressed by the affair, a drunken Lord Mountbatten allegedly told the bandleader at Quaglino’s one night:  “I am lonely and sad and drunk... Hutch has a p**** like a tree-trunk, and he’s f****** my wife right now.”

Edwina, however, was not the only one engaging in affairs. In 1932, Mountbatten began his own affair with Yola Letellier, a 20-something-year-old who was married. The two reportedly continued their relationship until Mountbatten’s death.

Read more: Queen Elizabeth's marriage to Prince Philip

Recently disclosed FBI reports, which slammed the couple as "people of extremely low morals," speculate that Lord Mountbatten was "a homosexual with a perversion for young boys."

Edwina died in her sleep of unknown causes in 1960. Lord Mountbatten was famously killed in 1979 when a bomb that was planted by the IRA exploded in a boat he was fishing off the coast of Mullaghmore, Co Sligo.

22nd April 1955: First Sea Lord Louis Mountbatten, Earl Mountbatten, at his office in the Admiralty. (Photo by Hulton Archive/Getty Images)

22nd April 1955: First Sea Lord Louis Mountbatten, Earl Mountbatten, at his office in the Admiralty. (Photo by Hulton Archive/Getty Images)