Robyn Brown is not impressed with husband Kody Brown’s latest confession.

In a sneak peek of the season 20 premiere of Sister Wives, which will air on Sunday, September 28, the couple come together for a dinner date. When the topic comes to possibly adding another sister wife into the family, however, things get a little less romantic and a bit more tense.

“I think you and I share something very special, but if it’s not duplicatable, it could put us at risk,” Kody, 56, shares in a preview obtained by People on Thursday, September 25. “Why would we put that at risk? For anything other than…”

Before Kody finishes his thought, Robyn, 46, completes his sentence by adding “a guarantee not possible.”

Christine Brown Jokes About Kody Competing on 'Special Forces'

Regardless of his concerns,

See Full Page