Marriage:

"...On 5 April 1859, [Joseph F.] Smith married his sixteen-year-old cousin Levira Annette Clark Smith (29 April 1842 Nauvoo, Illinois- 18 December 1888 St. Louis, Missouri), daughter of Samuel Harrison Smith. He and Levira had no children. Seven years later, Brigham Young directed him to take a plural wife. Levira was never able to adapt to Plural marriage and obtained a divorce in 1868 "due to interference on the part of relatives, and because of the continued absence of her husband in mission fields and in ecclesiastical duties..."

SOURCE: Wikipedia contributors, 'Joseph F. Smith', Wikipedia, The Free Encyclopedia, 23 May 2011, 14:12 UTC, <http://en.wikipedia.org/w/index.php?title=Joseph_F._Smith&oldid=430514297> [accessed 25 May 2011]