The Lady With The Pet Dog
A married man meets a married woman in a Russian seaside town.
"The stories told of the immorality in such places as Yalta are to a great extent untrue; he despised them, and knew that such stories were for the most part made up by persons who would themselves have been glad to sin if they had been able; but when the lady sat down at the next table three paces from him, he remembered these tales of easy conquests, of trips to the mountains, and the tempting thought of a swift, fleeting love affair, a romance with an unknown woman, whose name he did not know, suddenly took possession of him."