'Sister Wives' Polygamist Kody Brown Expecting a Baby With Fourth Wife Robyn

When proud polygamist Kody Brown, of the TLC reality series 'Sister Wives,' married his fourth wife back in May, both newlyweds had their hands full: Kody, 43, was already the father of 13 children with his first three wives, while Robyn, 31, was a single mother of three.

Now, news is breaking this weekend that a 17th child is on the way. That's right, Robyn (pictured at far right) is expecting her first baby with Kody.

"You should have seen the look on his face when we found out," Robyn told People.com. "It was priceless."

"I'm overjoyed," declares Kody about the pregnancy. "This connects Robyn and I together in a way that nobody can take away."

The newest addition to the brood is due in October 2011. During the first season, Robyn was a "fiance" just getting to know Kody and the "sister wives," and she married into the polygamist family when she exchanged vows with Kody in May 2010.

The fundamentalist Mormon family is now living together in Las Vegas, where they moved from Utah earlier this year. When 'Sister Wives' first aired on TLC, an investigation got underway putting the Browns at risk of federal bigamy charges (none were brought, according to Meri -- Kody's first, and only legal, wife).

Of relocating his large family to Las Vegas, Kody has said, "We've met a lot of really tolerant, open-minded people that have been friendly to us and just said, 'Welcome to Vegas.' They've literally said, 'We like having you here.'"

As Robyn looks forward to delivering the baby this fall, she hopes her perfect scenario comes to pass. "If Kody had things his way, he'd have me go to the hospital," she says. "But I just like having home births. I'm not big into sitting around in a hospital."

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Dimitrios Kambouris, WireImage

Dimitrios Kambouris, WireImage

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