Watch Kody Cry Tears of Joy in 'Sister Wives' Tell-All Promo Clip

Check out a new clip from the upcoming tell-all of the TLC show "Sister Wives," which is a two-hour special.

In the clip, Kody shares his reaction to being able to legally adopt Robyn's children. The episode will also focus on how Meri's catfishing incident affected her relationship with the family.

The "Sister Wives" tell-all airs on Sunday at 8/7c.