Khloe Kardashian has a prankster on her hands.

The Good American co-founder shared a video to her Instagram Stories on Thursday (May 29) documenting how her 7-year-old daughter, True Thompson, pranked her with one of her biggest fears. In the clip, the mom of two showed followers a close-up of her Louis Vuitton cherry-themed bag with a keychain of a blue bedazzled whale.

While this may seem innocuous enough, the Khloe in Wonder Land podcast host has spoken about her fear of whales in the past, a phobia that even she has noted was "irrational," per People.

"True is really into charms and she loves accessorizing her backpack, and apparently she loves accessorizing my purse because I just saw that she put this on my purse — this whale key chain," she said in the video.

The Kardashians star added that her oldest child knows about her aversion to whales and pranked her anyway, disregarding the other charms they own to adorn her bag with the sparkling creature.

"She knows and she does this. Because we have unicorn keychains, or hearts, or puppies or anything. She gives me a whale," she said. "Oh, I can't wait until she gets out of school, and I get to ask her about the whale. Why?"

In a follow-up video, True held up a pink bedazzled unicorn charm next to the whale. After Kardashian asked her if she was going to "replace this wackadoodle" with the unicorn, she joked that she should tell her daughter that she loves whales just to keep her from doing something like that again.

Kardashian shares True as well as 2-year-old son Tatum with ex Tristan Thompson. Earlier this year, she revealed that her daughter thinks the former couple are "married" and why she has no plans to correct her anytime soon.

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