Sister Wives season 19 has been a wild ride, and Robyn and Kody have clashed onscreen, showing off the darker side of their relationship, so maybe producers will choose to focus on Christine Brown in a possible season 20. For 19 installments, Kody has aired his journey with four wives. Now, it’s just him and Robyn, and the ghosts of the past that continue circulating, day in and day out.