By the end of 1913, Roberta married Ralph H. Edwards. William continued to work as a lawyer.
Source:
“U.S. City Directories, 1821-1989,” digital image, Ancestry.com (http://www.ancestry.com : accessed 5 May 2014), Indianapolis (1913), Wm B. Schwartz and Roberta V. Schwartz.
Genealogy Lady 
….but she is still listed here as a Schwartz. Doesn’t this sort of thing make your task harder? On the 1914 list she will be listed an an Edward, with no explanation of why she disappeared as a Schwartz?
Sometimes the directories listed the wife’s name in the husband’s listing, but some didn’t. It depends on the city and the year of publication. If the woman didn’t have a job outside the home, she was less likely to be listed.