Married at First Sight viewers have already watched Kristine forcing her husband to work out at the gym, and during their honeymoon in Costa Rica, she asked Keith to go on a bike ride with her so they could get a little exercise.
Kristine, who is very fit and active, wants the same out of her spouse. But unfortunately, Keith is a self-declared couch potato who loves to eat a woman's cooking and sit around and relax.
"He's so dramatic! I don't even think we went up a hill [on our bikes] and he was just sweating and out of breath," Kristine said during a Tuesday appearance on Married at First Sight: Unfiltered, which is hosted by Season 1 MAFS star Jamie Otis.
"I was like, 'Oh my gosh, you are so out of shape!' This is definitely only the beginning. I'm on a mission to get him completely [in shape] and rock hard. I need it."
Jamie then asked Kristine how she would feel if Keith still has "a keg" for a stomach one year -- or even five years -- from now if they are still married.
"I think that's going to end up being an issue," Kristine admitted.
"You know, if we're five years down the line, get yourself together at some point! It's what I'm interested in and what I'm attracted to. So, why don't you want to be what I'm attracted to?"
"It's fun to get out of your comfort zone, but it's not easy!" Pastor Cal insisted.
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Jamie then agreed there's nothing wrong with a man who has a one pack.
"No! Everyone's body is going to change," Pastor Cal explained to Kristine. "There will be a time when you have children and you have to understand..."
"It's not the same!" Jamie chimed in.
"That's fine! I'll keep him in shape and he can keep me in shape," Kristine concluded.
Kristine and Keith have had a solid relationship so far on Married at First Sight's eighth season, which airs on Tuesday nights on Lifetime.
The couple's chemistry is on point, and Keith has made it known he will do whatever it takes to please his wife.
However, Kristine may have trouble reaching Keith's expectations of a wife who cooks all of his meals considering she works a full-time job in real estate. And Keith may want to resort back to his lazy, couch-grazing days.