Lucy Wills never married – she was of a generation (and a class) which had lost a large number of its young men on the Western Front. She was close to her parents, her siblings, and their children. She enjoyed a number of close lifelong friendships, including with Christine and Ulysses Williams, with her Cambridge contemporary Margot Hume (with whom she jointly owned a cottage in Surrey whose botanical garden they cultivated), and with Kait Lucan (the dowager countess, mother of the disappearing earl), who was a fellow Labour councillor in Chelsea.