Short story by Ernest Hemingway, published in Cosmopolitan (Sept. 1936) and collected in The Fifth Column and the First Forty-Nine Stories (1938).
An American couple on a safari in Kenya, the Macombers have long given the impression of a glamorous and comparatively happy marriage, although the basis for their union is that “Margot was too beautiful for Macomber to divorce her and Macomber had too much money for Margot ever to leave him.” The marriage comes to a new straining point when in cowardice he runs from a wounded lion that he has shot badly, and she, in disgust, gives herself that night to the professional hunter and guide, the sturdy Englishman Robert Wilson. The next day, in a surge of excitement, Macomber discovers self-confidence and happiness as he shoots three wild buffalo, but Margot is suddenly made insecure as she sees him at last a man who will dominate their marriage. Forced to go into the hiding place of one of the animals he has only wounded to administer the coup de grace, Macomber seems about to be gored by the buffalo when from the car Mrs. Macomber shoots at the beast and kills her husband instead, after which Wilson says wryly,“Of course it's an accident. I know that.”