Robyn finally announces her new pregnancy; the older teens' discontent over their new life starts to bubble to the surface.

Kody, Christine and Janelle experiment with working in real estate; the teens are going out with new friends in Las Vegas; Robyn and Kody receive a scare.

After finding out Robyn's been spotting, she and Kody rush to see their midwife to find out what's wrong. Will their worst nightmare come be a reality? Later, the wives are on a mission to make over one room in each house.

We follow Kody through four days of his astonishing life, moving each day to the house of a different wife. Hear how his family and relationships with his wives has changed since the move. Plus, we finally learn the sex of Robyn and Kody's baby.

Kody and his wives finally return to his hometown for the first time as open polygamists. How will his childhood friends receive him? Later, after revealing the sex of the baby, Robyn and Kody finally decide to announce the name.

The sisters open up about an issue that has bothered all of them—their weight! Watch the sisters speak candidly about their battle with the bulge and see their attempts to the shed pounds as they they make their way to a gym for a body fat analysis.

Christine's daughter, Ysabel, and Robyn's daughter, Breanna, are moving out—to Meri's house. But will Meri be in over her head having them temporarily under her roof? Then, the Browns are off for some camping fun, but the teens have different ideas.

When another couple from the Browns' church in Utah comes to visit, the conversation turns to polygamy. How will the Browns respond to questions surrounding courting another wife and dealing with jealousy? What advice will they offer to ensure success?

The Brown family nervously accepts an invitation from a religious professor to talk to her students in Boston. Anxious about the question they will face, how will they respond? Meanwhile, the older teens tag along to visit some of Boston's best colleges.

The Sister Wives get makeovers and head to the strip for a night on the town while Kody stays home to babysit all the kids. How will they react when they come face to face with all the "adult" entertainment Vegas has to offer?

Kody heads for the Vegas strip for a guy's night out on the town, testing his wrestling skills against a mixed martial arts fighter and answering his friends' questions about his lifestyle. Meanwhile, the wives help setup Robyn's new nursery.

The Sister Wives are buzzing with excitement as Robyn's first contractions finally kick in. But not everyone is happy about it. The emotion builds as each of the Browns face their true feelings about Robyn's family becoming their own.