“
Perhaps at the heart of the matter was that Decca had long ago crossed an invisible line of behaviour acceptable to her family in England. People of her parents’ generation, and even most of her own, lived by a strict code that Decca never accepted, hardly recognized. By running away, by treating her parents as she and Esmond had done, by her active Marxism, by the hurtful, small exaggerations in her book, funny though they were, she had broken this code and although she was still loved and welcomed back, her loyalty was never entirely trusted.
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Mary S. Lovell (The Sisters: The Saga of the Mitford Family)