Brian C. Hales summarizes the Orson/Sarah Pratt, Joseph, and John C. Bennett scandal.
Brian C. Hales, Joseph Smith's Polygamy: History and Theology, 3 vols. (Salt Lake City, UT: Greg Kofford Books, 2013), 1:577–593
John C. Bennett's ability to generate confusion and strife was illustrated in his interactions with Sarah Pratt. Bennett said Joseph sought Sarah as a spiritual wife, while Sarah accused the Prophet of making an indecent proposal or even a seduction attempt. In response, Joseph and several other witnesses accused Bennett and Sarah of adultery during Orson's absence on a mission. After a surprisingly long period of quiescence, Orson reacted with emotional rejecting Joseph Smith's description of the events, which led to the Pratt's excommunications. Within a few months, however, Orson and Sarah were repatized. Orson became a staunch defender of the principle of plural marriage and of Joseph Smith's prophetic role. Years later, Sarah left the Church for the second and last time.