In ET’s exclusive sneak peek at TLC's 'Sister Wives: Christine and David's Wedding' special, Kody shares the awkward way he found out about his ex's big day at his sister's house. In the clip, Kody and Robyn also share their thoughts on the wedding and send their well wishes. Part 1 of 'Sister Wives: Christine and David's Wedding' airs Jan. 7 on TLC, followed by a part 2 on Jan.14. Source