‘Sister Wives’ star Robyn Brown is inconsolable. In ET's exclusive first look at part 4 of the 'Sister Wives’ one-on-one special, Robyn gets emotional about her former sister wives. Robyn feels she’s being ‘disrespectful’ to Christine, Janelle and Meri because she’s still in a relationship with Kody, and needs their blessing off-camera. Part 4 airs Sunday on TLC. Source