One Week of Life (1919)

Mrs. Sherwood hates her life with her husband, who is drinking increasingly as a result of his own unhappiness in the marriage. Mrs. Sherwood is in love with Le Roy Scott, who encounters a woman of astonishingly identical features to Mrs. Sherwood. He contrives to substitute the other woman, Marion Roche, in Mrs. Sherwood's place while he and Mrs. Sherwood escape for a tryst. But Marion is much more the wife that Sherwood dreamed of, and he falls in love "anew" with his "wife," and she with him. She determines to find some way to permanently replace the real Mrs. Sherwood.