Kody Brown and his four wives often have to defend their controversial religious beliefs and in a sneak peek of the upcoming episode of Sister Wives obtained by RadarOnline.com they try and set the record straight.

The polygamist family is questioned by an Episcopal minister called Danielle who asked if they shared the same faith and beliefs as other Fundamentalist Mormons who live on compounds.

“That is not part of our faith,” Kody explains. “But it comes from a desire to have community and it is because you’re different. Most Fundamentalist Mormons are so vastly different; they have very significant, different beliefs.

Sister Wives premieres Sunday night on TLC and everybody is talking about TV's newest reality series, and now RadarOnline.com can give you a sneak peek of an upcoming episode.

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The show looks at the life of Kody Brown, his three wives (only one is legal) and their 13 children; and the changing dynamics as he prepares to bring wife # 4 and here three kids into the home.

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The Brown clan says their polygamy is "faith-based" -- they're Fundamentalist Mormons -- and don't want to keep their lifestyle secret any more.

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