In ET's exclusive look at TLC's 'Sister Wives,' Christine has an awkward run-in with her ex, Kody, and his only remaining wife, Robyn, at a family gathering. The Brown patriarch admits he and Robyn are 'struggling,' while Robyn says this is the 'worst' they've ever been in their marriage. Robyn also shares Kody doesn't know who to blame following his splits from Christine, Janelle and Meri. 'Sister Wives' season 19 premieres Sept. 15 on TLC.
