The former MAFS couples expressed disbelief over a couple claims Derek and Katie had made early into the process during Lifetime's January 23 broadcast of Married at First Sight: Couples Couch, which features commentary on encore broadcasts of the show's tenth season.
On the topic of Derek's dating history prior to the show, Jephte admitted he wasn't buying the fact the 26-year-old Maryland cyber security engineer had never been in love before.
"I don't believe the dude when he said he's never been in love. The love probably never worked out, but to say you've never been in love after 26 years? Never?" Jephte reasoned.
Jamie then expressed happiness she wasn't the bride in Derek's new marriage to Katie.
"He said he's never been in love and he just married someone," Jamie pointed out to her husband. "I don't know if I'd want to marry someone who's never been in love."
"Yeah, that would be tough," Doug shared.
After Jephte reiterated how he didn't believe Derek's story of never having been in love before, Jamie added, "That's a huge red flag to me."
"How does he know how to love if he's never been in love?" Jamie questioned.
"They're going to work on it together," Doug suggested. "No one is going to be in love in the beginning -- you've got to work on it."
"I know, but you want someone with a little experience," Jamie explained.
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Derek, however, explained during the show he didn't want his marriage to feel like a one-night stand that wouldn't end, which previous Married at First Sight couples could understand.
Derek was matched to marry Katie, a 25-year-old mental health professional from Virginia, by Married at First Sight experts Pastor Calvin Roberson, Dr. Pepper Schwartz and Dr. Viviana Coles for the new season that premiered earlier this month.