By Lindsay Lowe | (staff@latinospost.com) | First Posted: Jan 28, 2013 12:05 PM EST

On Sunday night’s episode of Kourtney and Kim Take Miami, Kim took her skin care regimen to a new level. Lotions and creams apparently aren’t working for her, because now she’s using Kourtney’s breast milk to treat her psoriasis.

When she heard that milk could help ease symptoms of her mild skin condition, Kim “decided to ‘borrow’ some of Kourt’s milk,’ says AceShowbiz. Along with her friend Jonathan Cheban, Kim snuck into Kourtney’s kitchen, stole a container of her breast milk, and rubbed some onto her leg.

“Kourtney’s just helping a sister out, and she doesn’t even know it,” Kim said.

When Kourtney found out about the milk theft, she said, “My milk is like gold…My sister is stealing my breast milk? What a weirdo.” But according to AceShowbiz, “the mother-of-two then told her pregnant sister that she wouldn’t mind [giving] her milk,” and tried to squirt some onto Kim’s leg.

“Ew! Ew! That is so disgusting that you can just squeeze that and have it come out,” Kim said. “I’m not comfortable with it, like, fresh out of the boob.”

And somehow during all of this, Jonathan ended up wearing a breast pump bra. Not that any of these scenes could be artificial or staged in any way.

Here are some other highlights from last night’s episode, courtesy of Hollywood Life:

“Kourtney accidentally sends an email to Scott that was meant for her therapist!”

“Kourtney does yoga with Mason.”

“Kim parties with Scott while Kourtney stays home.”

Kourtney and Kim Take Miami airs Sundays at 10:30 pm EST on E!

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