In ET's exclusive look at TLC's 'Sister Wives,' Kody's daughter, Mykelti, visits town. Robyn inquires about being a godmother to Mykelti's daughter, Avalon, amid Mykelti's mom, Christine's, departure from their plural marriage. Kody puts Mykelti in the hot seat with questions about Christine leaving. 'Sister Wives' airs Sundays on TLC.
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