William Law files a formal complaint with the Hancock County circuit court charging Smith was living "in an open state of adultery" with Maria Lawrence, Smith's foster daughter and polygamous wife. Maria Lawrence was a teenaged orphan who was living in the Smith household. In fact, Smith had secretly married both Maria, age 19 ,and her sister Sarah, age 17 on 11 May 1843 and was serving as executor of their $8,000 estate. William Law apparently hoped that disclosing Smith's relationship with the young girls might lead him to abandon polygamy, but Smith immediately excommunicated Law, had himself appointed the girls' legal guardian, and rejected the charge in front of a church congregation on 26 May 1844, denying that he had more than one wife. Suit filed against Smith for adultery with foster daughter.
[Joseph Smith Polygamy Timeline, http://www.i4m.com/think/polygamy/JS_Polygamy_Timeline.htm]