Cc1 Test message From New York City, this is "Nightline" with Dan Harris. Good evening. Brady Williams and his five wives and 24 children are letting in the cameras the way you've never seen before.... See More
Cc1 Test message From New York City, this is "Nightline" with Dan Harris. Good evening. Brady Williams and his five wives and 24 children are letting in the cameras the way you've never seen before. We travelled to Utah to meet this very large, very unusual family. Reporter: 6:00 A.M., it's a Normal start to the day in the Williams household. A kiss on the cheek. A few rooms over a quick cuddle with Rhonda, then a smooch for robin, another for rosemary and finally one for none. Welcome inside the world of Brady Williams, a polygamist unlike any you have ever met. I really consider myself a feminist. Reporter: There is no way the five women sit hearing are equal to the one man of this house. Certainly polygamy has been patriarchal, the man is in charge. I like to think we've evolved and are still evolving. Reporter: This family is so how the there, they are even shunned by regular polygamists. They used to be fundamentalist mormons but not anymore. They have a little drink. The parents even teach their kids it's okay not to follow in their plural marriage foot steps. Reporter: From the outside in, I'm still scratching my head. They call themselves Progressive polygamists and in their new TV show "My five wives," they reveal an ordinary family -- I had five wives by the time I was 29 years old. Reporter: Or so they would have you believe. It's not that complicated. We love each other. It's just Normal times five. Reporter: It's a bigger house. The Williams family joined the growing list of polygamists in primetime. But this reality show takes cameras where none have gone before, the polygamy bedroom. My beautiful girl. Reporter: All of America is having sex. So are we. And, no, there's no hanky panky going on between all of us. Reporter: Can you name all of your children? I have Carlo, then Hannah, then josh, then it's Kimberly and then Taylor goes -- um, it would be the boys. No? One more girl. Reporter: How is this family of 30? There are two homes next to each other. Rosemary, Pauline's home -- Reporter: Each wife and their kid have their own space. Every evening the family eats dinner together, though there never seems to be enough chairs and their month live grocery bill? $4,000. To afford it all, some. Wives work and Brady runs a construction company. The mainstream church band polygamy more than a century ago but the Williams live in rural Utah, where all their neighbors are fundamentalists normons who believe polygamy is the way to get to heaven. Not long ago, the Williams believed that, too. The women are all cousins, taught to be good, obedient sister wives. I was never going to leave. Reporter: Brady was a bishop in the church but it wasn't for him. If polygamy isn't a means to get to heaven, why polygamy? We spent years and year building this family. I can't say I never thought of leave bug it would devastate the family. Reporter: What they do want to do is move out of this community. The leadership of the community has made it clear because of the decisions that we've made, it would be better if we left. And I agree. We're an outsider. We're misfits. I had a silly question once, someone asked me if we all slept in the same bed. That's ridiculous. That would have to be a big bed. Reporter: You know you've wondered so here's how it works. Every night Brady rotates between wives. Each wife gets to sleep with him every fifth night. When he's not there -- I made him a pillow case, a little dream with my name so it's like he's dreaming about us. Reporter: When the clock strikes noon, Brady heads to the next wife's house. And do you have, like, socks in every house? Yeah, I have way too many clothes. Polygamy problems. Reporter: Polygamy problems can be very real. The biggest one, the inevitable jealousy that comes with five women being with one man. Everybody remember I'm going to be with robin tonight for her birthday tonight. Everybody got that? Reporter: You know he's having relations with other women. Do you think about that? No, I don't. It hurts me if I go there. These are sacred relationships between a husband and a wife and I feel like I'm honestly intruding on that when I'm put being my mind there. I figured you guys are tired and you need some sleep. Reporter: It's kind of like living in a strange sorority. The women can't help but compare themselves to each other. I've always felt like I had Barbie and sleeping beauty for sister wives in Polley and robin. I'm just the chubby one. You'd rather be making love to a skinny woman. Oh, baby. I don't. I make love to you because I love you. I love you, right? You know that? I haven't stopped chasing you around the room. You horn dog. Reporter: There never seems to be enough of the man to go around. I would rather have 20% of a good man than zero. Reporter: Don't even bother trying to find the right label for them. Polygamist, fundist mormo-- fundamentalist mormons. Reporter: Would you marry again? I don't want another one. Not to say they're not great. "My five wives," Sunday night on tlc.
This transcript has been automatically generated and may not be 100% accurate.