Here is the piece. If you can't say fornicate can you say copulate or if not that can you say co-habit? If not that would have to say consummate I suppose. Use your own good taste and judgment.
Ernest Miller Hemingway (July 21, 1899 July 2, 1961) was an American novelist and short story writer whose works, drawn from his wide range of experiences in World War I, the Spanish Civil War, and World War II, are characterized by terse minimalism and understatement; they exerted a significant influence on the development of twentieth century fiction. Hemingway's protagonists are typically stoic male individuals, often interpreted as projections of his own character, who must master "grace under pressure". Many of his works, like The Sun Also Rises, A Farewell to Arms and The Old Man and the Sea, are now considered classics in the canon of American literature.