Khloé Kardashian shows her sister Kylie Jenner some sisterly love — by making fun of her fake lips on Snapchat!

The duo was on the social media platform to promote Khloé's new show Revenge Body, when Kylie's overly plump lips became the topic of conversation.

"I finally have Kylie Jenner lips," the 32-year-old beauty says into the camera, after a filter made her lips twice their normal size.

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Kylie joined in on the fun, making a duck face with the filter before laughing at the joke.

While it was all in harmless fun, Khloé is not the first Kardashian sister to tease the lip kit mogul about her plump pout.

Kim Kardashian has insulted Kylie on Snapchat as well, noting that she noticed nothing different when her 19-year-old sister used the face-morphing filter.

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“Why do you look normal?” Kim said in the video. “I look normal??” Kylie asked, surprised, to which Kim responded the subtle jab, “Yeah, that’s how you look.”

Jokes aside, Kylie opened up getting lip injections at a young age — revealing her mouth has always been her biggest insecurity.

"This guy I kissed was like, 'Your lips are really small but you're a really good kisser. I didn't think you were gonna be good at kissing.' It was so rude," she told Complex magazine. "From then on, I just felt like I saw guys staring at my lips. I felt like no one wanted to kiss me."

She continued, "I didn't want people to think you had to get your lips done to feel good about yourself. But they thought it was crazier that I was lying about it because it was so obvious. I wish I had just been honest and upfront."

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However, fans are now accusing the star of hiding another plastic surgery procedure: a boob job.

kylie jenner instagram
Instagram

The KUWTK star stepped out with noticeably larger breasts on a recent vacation with her boyfriend Tyga — and this time she can't blame her time of the month.

“Are those real" one commenter wrote while another typed, "Someone had boob job! No one is every day on that time of the month."

We'll just have to wait and see. For more selfies of her famous lips, click through the gallery below!