Several critics claimed to be baffled by the title of this film, but, as the plot concerns a psychological problem incurred by the heroine some five years earlier (i.e., in 1959), its meaning is self-evident.
Beatrix Lehmann (1903) was only 23 years older than Patricia Neal (1926) who plays her GRANDDAUGHTER.
This is the movie Neal consented to do, regretfully, after the role she wanted in "The Pumpkin Eater" wasn't definitely confirmed as hers; the part was given instead to Ann Bancroft, who earned an Oscar nomination for her performance.
This film and "The Pumpkin Eater," both released in 1964, in black-and-white, share several similarities: each of the female leads, both portrayed by American actors, suffers from a psychological and emotional disorder; each has a philandering husband, both professional men, cheating with younger women: one, the main character's sister and the other, a family friend and nanny; each of the main female characters has young children; each lives in an upper-class, London townhouse; each has an excursion to a London department store; each has an appointment with a hairdresser; each wears a big hat; both films begin in London and end in the countryside; both women have life-changing revelations; both films have vague, open-ended conclusions.