Sister Wives, Four Wives and Counting...

Kody heads south to court his potential fourth wife, Robyn. Meanwhile back home, the wives express their true feelings about their new possible sister wife as they make preparations for Christine's new baby.

Kody and his teenage daughters throw a birthday party for his new fiancee, Robyn. Meanwhile, first wife Meri struggles with feelings of jealousy as the whole Brown clan moves Robyn, and her anxious kids closer to the family home.

Kody's fiancee Robyn helps out with the kids while Kody and his pregnant third wife Christine go to the hospital. A week overdue, they must make an important decision on whether or not to induce labour.

While the three wives buy a friendship ring for Kody's fiancee Robyn, Kody prepares to celebrate his 20th Anniversary with his first wife, Meri. But when nothing goes as planned, will Kody end up in the dog house?

As the wedding nears, the three wives help fiancee Robyn pick a wedding dress, a cake, and a venue for their unique polygamist wedding reception. Meanwhile, it's Janelle's birthday, and Kody has a special trip planned.

The big day is finally here! Kody and his wives officially make Robyn wife number four. The extraordinary family celebrates the newest additions to their family and prepare to embark on a new chapter in their lives.

NBC's Natalie Morales sits down with the Browns from TLC's smash hit Sister Wives for a candid discussion about love, marriage, jealousy, and what the future may hold.

Kody and new wife Robyn are off on their honeymoon, spending time surfing, and visiting a nearby zoo. Meri, Janelle and Christine stay back home with the kids, but will they have a hard time coping while Kody is away?