Graham Greene, 1951. Maurice Bendrix and Sarah Miles in wartime London.
From Wikipedia
The End of the Affair is a 1951 novel by British author Graham Greene, as well as the title of two feature films that were adapted from the novel. Set in London during and just after the Second World War, the novel examines the obsessions, jealousy and discernments within the relationships between three central characters: writer Maurice Bendrix; Sarah Miles; and her husband, civil servant Henry Miles.