I can't like Diana or Unity at all.

They all had interesting lives, though.
The brother, Tom, was reported to have had a relationship with James Lee-Milne, the diarist. I haven't read his diaries but perhaps there's something of the family in there?
Nancy's father-in-law, Lord Rennell, was reported to have had a relationship with Oscar Wilde. Her relationship with Col. Gaston Palewski (an aide to Charles de Gaulle and later a prominent statesman) lasted on-and-off until he married Violette de Talleyrand-Périgord, Duchess of Sagan, daughter of one of the 'Dollar Princesses', Anna Gould.
Debo's sister-in-law was Kathleen Kennedy (sister of President Kennedy). She married William Cavendish (and suffered a break with her mother over the religious differences that never healed) and would've become the Duchess of Devonshire had 'Billy' not been killed in the war. Debo's granddaughter is one of those ridiculously skinny models, Stella Tennant. Further, Debo's father-in-law, died of a heart attack while under the care of the suspected serial murderer John Bodkin Adams. The coroner should have been notified since the duke had not seen a doctor in the 14 days prior to his death, however, Adams, though present at death, could sign the death certificate to state that the Duke died naturally.The Duke's brother-in-law, Harold MacMillan, the Prime Minister, wanted Adams's case to go away (he was under investigation for another death shortly before the Duke's) apparently so that MacMillan's wife's own affair wouldn't come out during the intense publicity.
Diana's 2nd husband, Oswald Mosley, was first married to Cynthia, one of the daughters of the former Viceroy to Indian, Lord Curzon--another interesting set of sisters (with their own book, The Viceroy's Daughters) and daughters of another Dollar Princess, Mary Leiter. Cynthia had been elected a Labour MP in 1929. While Diana left her husband for Oswald, he wouldn't leave his wife. He was grief-stricken upon her death but didn't turn to Diana, but rather launched an affair with his sister-in-law 'Baba' Metcalfe, wife of 'Fruity' Metcalfe, best man to the Duke of Windsor at his wedding. Cynthia and Baba's stepmother, Grace (subject of John Singer Sargen's last oil portrait), also became a mistress to Oswald. To complete the set, the eldest of the 3 sisters, Mary Irene, had had an affair with him before he married.

Eventually, Oswald and Diana married at Joseph Goebbel's house with he and Hitler as witnesses. They were forced to quietly remarry after the war since Hitler had held the marriage license and it wasn't found after the war ended. MI5 had files on the couple and it was their opinion that Diana was 'said to be far cleverer and more dangerous than her husband and will stick at nothing to achieve her ambitions. She is wildly ambitious." They settled in Paris where they were neighbors and (surprise) friends with the Duke and Duchess of Windsor. I'm sure this friendship, with the Mosley's unrepentant feeling for the Nazis and continued vocal support of Fascist causes endeared the Windsors to their family.
