It's usually all about the Sister Wives, but this week all four wives turn their focus on Kody and reveal some of his biggest secrets. They open up about why he became a polygamist and what he was thinking when he agreed to go public with his illegal life

In the latest two-hour installment of Sister Wives Tell All, the Brown family sits down with NBC's Erica Hill for their most emotional and candid conversation yet. The family discusses their relationships, their kids, and the ongoing catfishing scandal.