Allegedly with his wife's consent, Finzi had a romantic affair with his ailing sister-in-law, Jackie, who was exhibiting suicidal behaviour as the result of a nervous breakdown.
During the 1970s, du Pré taught music and the flute at Downe House School in Cold Ash, Berkshire.
She claimed to have agreed to her sister Jackie's affair with her husband Finzi, because she wanted her to experience the stable family life the younger woman envied.
A group of Jacqueline du Pré's closest colleagues (including fellow cellists Mstislav Rostropovich and Julian Lloyd Webber) sent a bristling letter to The Times.
"[5] Hilary du Pré strongly defends both the book and the film, writing in The Guardian: "At first I could not understand why people didn't believe my story, because I had set out to tell the whole truth.