Joseph C. Kingsbury participates in a "pretend marriage" to seventeen-year-old Sarah Ann Whitney order to help Joseph Smith disguise his secret marriage to her. Kingsbury writes in his autobiography, "I according to Pres. Joseph Smith & Council & others agreed to stand by Sarah Ann Whitney as though I was supposed to be her husband and [participated in] a pretended marriage for the purpose of . . . Bringing about the purposes of God in these last days . . ."
[Source: On This Day in Mormon History, http://onthisdayinmormonhistory.blogspot.com]