Kody, his wives Meri, Janelle and Christine and their 13 kids are a polygamist family in Utah. Koby has decided to add a fourth wife to the family, a woman who is younger than his current wives and three of their children.
Sorry, no info about the next episode of Sister Wives is available yet.
The TV show is either in vacation or waiting to start their new season. When information about future episodes becomes available, it will be posted here.