Sarah Yorke Jackson
The couple and their children reached the White House on November 26, 1834. She immediately started to act as the First Lady. At the same time, the President’s niece Emily Donelson was also acting as the First Lady. This is the single example of two ladies acting as the First Lady in the history of the United States. In 1836, Emily died of tuberculosis. After that, Sarah continued to act as the First Lady.