Lucilla Matthew Andrews was born on 20 November 1919 in Suez, Egypt, the third of four children of William Henry Andrews and Lucilla Quero-Bejar. They met in Gibraltar, and married in 1913. Her mother was daughter of a Spanish doctor and descended from the Spanish nobility. Her British father workerd by the Eastern Telegraph Company (later Cable and Wireless) on African and Mediterranean stations until 1932. At the age of three, she was sent to join her older sister at boarding school in Sussex.
She joined the British Red Cross in 1940 and later trained as a nurse at St Thomas' Hospital, London, during World War II. In 1947, she retired and married Dr James Crichton, and she discovered, that he was addicted to drugs. In 1949, soon after their daugther Veronica was born, he was committed to hospital and she returned to nursing and writing. In 1952, she sold her firt romance novel, published in 1954, the same year that her husband died. She specialised in Doctor-Nurse romances, using her personal experience as inspiration. In 1969, she decided moved to Edinburgh. Her daugther read History at Newnham College, Cambridge, and became a journalist and Labour Party communications adviser, before her death from cancer in 2002. She died on 3 October 2006 in Edinburgh.