KUWTK Preview: Khloe Kardashian Admits The Truth About Her Little Sister: 'Kylie Decided To Plump Her Lips'

Kylie Jenner's lips have been the talk of the town for months now, and finally, the truth will come out on Sunday's Keeping Up With The Kardashians. Is it really just the clever use of lipliner that makes her lips look so full, as she insisted? Or did the 17-year-old actually add a little plumper to her pucker?

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It definitely seems like it's the latter! While doing press for her new line of hair extensions, Kylie gets asked for the first time about her lips. After not knowing quite how to answer the question—we guess they don't media train for that—Kylie asks her older sister, Khloe, for advice on how to handle it. Kylie says she doesn't want to confirm nor deny the rumors, though Khloe does it for her. "Kylie decided to get her lips plumped," she says in the interview portion of the scene. But unlike Kylie, Khloe thinks "it is right to cop up to it."

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So we guess that means Khloe will be copping up to this?! In this clip, Kim and Kendall watch on as Khloe gets a laser treatment to zap away the cellulite on her butt. "It stings like a mother," she screams. Ya think?

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But while her sisters are working on making their bodies look better, Kourtney's trying to improve houses, serving as Scott's interior designer on a house he's attempting to flip. But Scott rethinks having her as his business partner because her taste is too expensive. Again, ya think?!

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Watch all three sneak peek clips above, and tune into a new episode of KUWTK Sunday, May 10 at 9pm on E!.

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Are you happy that we finally know the truth about Kylie's lips? Do you wish she was upfront about them in the first place? Tweet us @OKMagazine.