The health-conscious sister isn’t having it, y’all. Kourtney Kardashian got into it with her younger sis Kim Kardashian over their daughters North West and Penelope Disick‘s birthday theme — and the 40-year-old’s penchant for staying healthy at all costs fueled the tensions. In a new sneak peek clip from Keeping Up With the Kardashians season 17, the moms have it out.

“Call the police,” Kim, 38, joked as she and Khloé Kardashian entered their sister’s living room to chat. “There’s candy in here!”

Naturally, if you’re a fan of the Kar-Jenner clan, you know Kourt is the most vocal about being healthy and doing right by your body. So, of course, she admitted the candy in question came from their mom, Kris Jenner, and is the “only hidden stash of candy” they’ll find in her house. Typical Kourt.

The convo then steered toward North and P, cousins and BFFs who tend to share their birthday festivities since the dates are within a month of each other. Back in mid-June, the dynamic duo had a blowout Candy Land-themed bash … but we had no idea their moms had a bit of a tift over it.

“There’s no reason that you can’t have the theme of the party and have treats that are…” the eldest sis began, but Kim cut her off almost immediately when she realized her sister’s intentions.

“It’s Candy Land,” the KKW Beauty mogul interrupted, trying to prove a point. Kourt’s counterpoint, however, was that there are candies and treats that aren’t “filled with chemicals” to serve. But stubborn Kim obviously didn’t believe it.

After Kourtney vowed to prove herself, Kim exploded just a little bit. “It’s a Candy Land-themed party! That’s, like, what the party is about,” she repeated herself. “It’s not f—king Gluten Free Land over here.”

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But when both babes hit a wall with each other, Kourtney finally suggested they throw separate parties for the girls. “Perfect,” Kim replied with bite. “That’s exactly what we’ll do.”

Looks like the road to Candy Land had a few more potholes than we thought.

Keeping Up With the Kardashians returns this fall on E!