Question: What was the name of the mistress of the President who appointed Alice Brown Davis?

Context paragraphs:
Alice Brown (writer): Alice Brown (December 5, 1857 – June 21, 1948) was an American novelist, poet and playwright, best known as a writer of local color stories.  She also contributed a chapter to the collaborative novel, "The Whole Family" (1908).

Alice Brown (ombudsman): Alice Brown {'1': ", '2': ", '3': ", '4': "} (born 30 September 1946) is a Scottish academic who is Emeritus Professor of Politics at the University of Edinburgh.  She was on the consultative steering group that advised on procedural aspects when the new Scottish Parliament was being set up.  Her work included promoting the equal representation of women.  She was the first Scottish Public Services Ombudsman, serving for two terms between 2002 and 2009, and was a member of the Administrative Justice and Tribunals Council 2008–2012.  She was a member of the Committee on Standards in Public Life 1998–2003 and was elected as the first female General Secretary of the Royal Society of Edinburgh (RSE) 2011–2013.  She has been chair of the Scottish Funding Council since 2013.

Warren G. Harding: Warren Gamaliel Harding (November 2, 1865 – August 2, 1923) was the 29th President of the United States, serving from March 4, 1921, until his death in 1923.  At the time of his death, he was one of the most popular presidents, but the subsequent exposure of scandals that took place under his administration, such as Teapot Dome, eroded his popular regard, as did revelations of an affair by Nan Britton, one of his mistresses.  In historical rankings of the U.S. presidents, Harding is often rated among the worst.

Alice Brown Davis: Alice Brown Davis (September 10, 1852 – June 21, 1935) was the first female Principal Chief of the Seminole Tribe of Oklahoma, and served from 1922–1935, appointed by President Warren G. Harding.  She was of Seminole (Tiger Clan) and Scots descent.  Her older brother John Frippo Brown had served as chief of the tribe and their brother Andrew Jackson Brown as treasurer.

Norma Parker: Norma Alice Brown (née Parker) CBE (1906–2004) was an Australian social worker and educator.  She is regarded as one of the founders of social work in Australia and established Catholic social work at St Vincent's Hospital, Melbourne in 1932 and St Vincent's Hospital, Sydney four years later.

William S. Sly: William S. Sly (October 19, 1932 – ) is an internationally known physician/scientist who, except for sabbatical years at Oxford and Stanford, spent his entire academic career in St. Louis.  Following M.D. training at Saint Louis University School of Medicine, he trained in Internal Medicine at Washington University in St. Louis and in research laboratories at the NIH, in Paris, and in Madison, Wisconsin.  He then joined the faculty at Washington University, where he directed the Division of Medical Genetics for 20 years.  In 1984, he was recruited to St. Louis University School of Medicine and appointed Alice A. Doisy Professor and Chairman of the Edward A. Doisy Department of Biochemistry and Molecular Biology.  He chaired that Department for 26 years.  In February 2007, he was also named the inaugural holder of the James B. and Joan C. Peters Endowed Chair in Biochemistry and Molecular Biology.  He became an Emeritus Professor in July 2014.

Joyce Brown (netballer): Joyce Alice Brown, OAM (born 1938) is an Australian netball player and coach, who has both coached and captained the Australia national netball team.

Roy Fitzsimmons: Roy G. Fitzsimmons (1916 – May 5, 1945) was an American Polar Explorer and Geophysicist.  Born LeRoy Fitzsimmons, he was the youngest child of John and Alice Brown Fitzsimmons and was one of 10 children.

Alice Brown Chittenden: Alice Brown Chittenden (October 14, 1859 - October 13, 1944) was an American painter based in San Francisco, California who specialized in flowers, portraits, and landscapes.  Her life's work was a collection of botanicals depicting California wildflowers, for which she is renowned and received gold and silver medals at expositions.  She taught at the Mark Hopkins Institute of Art (now the San Francisco Art Institute) from 1897 to 1941.

Edward and Elaine Brown: Edward Lewis Brown (born 1942) and his wife, Elaine Alice Brown (born c. 1940), residents of the state of New Hampshire, gained national news media attention as tax protesters in early 2007 for refusing to pay the U.S. federal income tax and subsequently refusing to surrender to federal government agents after having been convicted of tax crimes.  After the conviction and sentencing, a long, armed standoff with federal law enforcement authorities at their New Hampshire residence ended with the arrest of Edward and Elaine Brown on October 4, 2007.  In July 2009, while serving their sentences for the tax crimes, the Browns were found guilty by a federal district court jury of additional criminal charges arising from their conduct during the standoff.

Supporting paragraphs: Alice Brown Davis Warren G. Harding
Answer: Nan Britton