Sister Wives is an American reality television series broadcast on TLC that premiered on September 26, 2010
The show documents the life of a polygamist family, which includes patriarch Kody Brown, his four wives, and their 18 children. The family began the series living in Lehi, Utah, but has since moved to Las Vegas, Nevada in 2011.
Brown and his wives have said they participated with the show to make the public more aware of polygamist families and to combat societal prejudices. Brown believes his polygamist arrangement is legal because he is legally married only to one woman, and the other marriages are spiritual unions. The series led to the Brown family being investigated for possible prosecution.
Source: Wikipedia
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