In an excerpt from her memoir A Marriage in Check: The Heart of the Bride Stripped Bare by Her Bachelor, Even, Duchamp’s wife Lydie Fischer Sarazin-Levassor tells about their relationship.  Although they initially  had a happy marriage, Sarazin-Levassor soon found herself excluded from Duchamp’s life.  Duchamp essentially abandoned his wife, and altough she atttempted to put up a facade of a happy marriage, the two eventually divorced a year after marrying.  Here is another link with information (in French) about the new English edition of the book and the original French edition: http://www.lespressesdureel.com/ouvrage.php?id=968