During a recent episode of Sister Wives season 19, Kody Brown helped baptize Aurora Brown, which may have sparked a religious revival for the Brown family. 22-year-old Aurora is one of Robyn Brown's children from her first marriage. Robyn, 45, is Kody Brown's fourth wife. She joined the family in 2010, along with her three children. Robyn and Kody would go on to have two children of their own.