But now that it is the target of a bigamy investigation by police in the state of Utah, one advocate worries that the probe will instil fear in other plural families about going public with their lives.
"If it really goes to a court situation, then our people are going to go right back into isolation," said Anne Wilde, co-founder of Principle Voices, a non-profit that seeks to educate the public about polygamous families.
Over the past 10 years, Utah's historically insular polygamist community has worked with state agencies to increase understanding of the unique aspects of polygamous culture, Wilde said. As a result, plural families are now less hesitant to seek help and services when needed, she said.
The Brown family's decision to do the reality TV show was an extension of that education work, said Wilde, who knows the family well.
Sister Wives, which premiered on cable channel TLC on Sunday, chronicles the life of 41-year-old advertising salesperson Kody Brown, his four wives, 13 children and three stepchildren.
The Browns have said they hoped that the peek into their lives would help broaden the public's understanding of plural families.
Lehi police are investigating whether the family is violating bigamy laws in plain view on cable TV. Brown is only legally married to Meri but also calls three other women his spouses: Janelle, Christine and Robyn.
"When we decided to do this show, we knew there would be risks," the Brown family said in a statement released on Tuesday. "But for the sake of our family, and most importantly, our kids, we felt it was a risk worth taking."
Most polygamist families practice in secret, but it has entered the national dialogue given its portrayal on the HBO scripted drama Big Love.
The modern Mormon Church excommunicates members found engaged in the practice, which was disavowed by the church in 1890 as part of a push for Utah's statehood.
On a TLC ad for Sister Wives, one wife says: "I think we're normal, and then I go out and then I'm like, ‘Oh yeah, I can't tell anybody about my normal family’.”
Across Utah and parts of the western US, an estimated 38 000 self-described fundamentalist Mormons continue to believe and practice polygamy, believing it brings exaltation in heaven.
Although it is rarely prosecuted, bigamy is a third-degree felony in Utah, punishable by a prison term of up to five years.
Under the Utah law, a person can be found guilty of bigamy through cohabitation, not just legal marriage contracts.
Lehi police said the evidence gathered from the probe will be turned over to the Utah County Attorney's Office for possible prosecution. A message left for Paul was not immediately returned on Tuesday.
Utah last prosecuted a polygamist for bigamy in 2001. Tom Green, who was married to five women and drew the attention of Utah authorities after promoting his lifestyle on national TV talk shows, was convicted on bigamy, criminal non-support and child rape charges. He spent six years in prison and was released in 2007.
The Utah Attorney General has investigated the state's secretive polygamous communities, but focused efforts on cases involving allegations of abuse, sexual assault and fraud, not bigamy.
"It has been our office's position not to pursue cases of bigamy between consenting adults," the Attorney General's spokesperson, Scott Troxel, said on Tuesday. "We want to use our resources wisely."