He was the second president to wed while in office, and has been the only president to marry in the White House. This marriage was unusual because Cleveland was the executor of Oscar Folsom's estate and had supervised Frances's upbringing after her father's death; nevertheless, the public took no exception to the match. At 21 years, Frances Folsom Cleveland was the youngest First Lady in history, and the public soon warmed to her warm personality. This marriage was unusual because Cleveland was the executor of Oscar Folsom's estate and had supervised Frances's upbringing after her father's death; nevertheless, the public took no exception to the match.