Marriage a La Mode is a 1921 short story by Katherine Mansfield. It was first published in The Sphere on 31 December 1921, and later reprinted in The Garden Party and Other Stories. - The title is a play on the phrase mariage à la mode in French, which means 'fashionable marriage'.
William would usually buy his children sweets because he knows his wife won't let him buy them 'big donkeys and engines', as that would be unseemly. This time he buys fruit instead.