On the March 11 broadcast of Married at First Sight: Unfiltered, Pastor Cal watched back a Season 10 clip of Derek admitting to Katie he had gotten a little too complacent and comfortable in their marriage and needed to put forth more effort as a result.
"I had given it up to you physically on like Day 3 of the wedding, but don't get it twisted, Derek... I just don't want you to think that you've got it, and I'm sorry if this is f-cked up, but like, I do want you to be a little scared," Katie said.
"What I know is that I'm going to make you fall in love with me," Derek replied in the clip.
While Pastor Cal gave props to Derek for being considerate, he had a bone to pick with Katie.
"I love the fact that he took personal responsibility," Pastor Cal said of Derek on Unfiltered. "But I'm not too comfortable with Katie and what she said."
"'I don't want you to feel comfortable. I want you to feel a little scared. I don't want you to feel as though you have me.' You don't want any relationship to be on that shaky of a foundation," Pastor Cal explained.
"Both people should be solidly confident in the fact that I'm not going anywhere and you're not going anywhere. We have this."
Pastor Cal was joined on the Unfiltered broadcast by Season 10 brides Taylor Dunklin and Meka Jones, and the girls apparently didn't even understand why Katie had concerns at this point in the marriage experiment.
"I don't have any concerns with Derek. Take my concerns, [Katie]!" Taylor said with a laugh.
Jamie agreed Derek seemed like "a great guy," and then Pastor Cal pointed out, "He's awesome."
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"Have you seen these husbands over here?!" Jamie joked, referring to Taylor's husband Brandon Reid and Meka's husband Michael Watson.
"Oh stop!" Pastor Cal said, laughing. "That's terrible! They have the potential to be great! They have the potential to be great."
"They do," Jamie conceded. "They do, they do."
Meka acknowledged she was "happy" at least someone's marriage was "going really good" near the halfway mark of the Married at First Sight process.
"I would be really happy [if Michael] decided to say that [he'd make me fall in love with him], because that's what I want," Meka shared.
"But honestly, with how me and Michael's marriage has been going, it would have to be followed up with action. Because right now, that wouldn't mean that much to me, to be honest."
As viewers are well aware, Meka has accused Michael of lying on numerous occasions, especially about his career. And Taylor and Brandon have been at odds ever since Brandon lashed out and cursed at her on the last day of their Panama honeymoon.
Since Taylor was having a tough time in her marriage as well, she noted on Unfiltered it was "refreshing" to see a Season 10 couple working towards a happy, lasting marriage.
"If I were to hear that [Brandon wanted to fight for me], it would make me be more open. I just have so many walls, [it's like], 'Can you assure me that you want this and we want this and we're actually on the same page?!'" Taylor explained.
Katie worried Derek would never fall in love her or find her worthy of being his first -- and potentially -- only love.
However, the latest episode showed Katie and Derek feuding over the fact she wanted to keep her townhouse despite being married and living in a new apartment together.
Derek apparently took Katie's decision personally and asked why she was so "disgusted" by living with him.
"It ended with Derek saying, 'F-ck you' to me, which I did not like. And I honestly just felt, like, so unimportant... Now I'm feeling disrespected and overlooked a little bit, so we'll see what happens," Katie said in a confessional.
Derek eventually apologized for his language and snapping at his wife, so the pair made up during their one-month anniversary dinner, which was followed by a romantic bath for two.