Glimpses of the Moon, The by Edith Wharton (1862 - 1937)

"The Glimpses of the Moon" (1922) is about Nick and Susy Lansing, both of whom live a decadent life in Europe by sponging off wealthy friends. They marry out of convenience and have an "open" relationship, but are unprepared for where their feelings will take them. (Summary by Elizabeth Klett)