In Sunday's episode of 'Sister Wives,' Kody takes a road trip with two of his teenage daughters to court potential fourth wife Robyn.
The first three wives talk about the jealousy they experienced when they learned Kody and Robyn shared a premarital kiss.
"I found out that Kody sealed the engagement with a kiss and I freaked," Christine says. "We didn't seal the engagement until the alter because I didn't feel right about kissing a married man. So to me the fact that he had kissed Robyn was devastating."
Robyn describes the kiss with laughter then breaks down crying when she talks about Christine's reaction.
"I knew it would be complicated, but I didn't know it would break my heart as well," she says.
If you missed the premiere episode of 'Sister Wives,' you can watch it here.WATCH: