Applying lipstick ALL over her lips (and entire mouth), Kendall also wore a very Kylie pink wig for the tutorial.
"I love over-lining my lips, this is how it all started," Kendall said. "Literally, I just over-lined my lips and everyone was wondering what I was using."
"Omg it feels amazing on my skin," Kendall joked, smearing it on her face.
She also FaceTimed her to show off her new ~lewk~, and Kylie actually approved.
"You look amazing. You look cute as Kylie," she admitted.
However, we don't think the young reality star would think so after seeing Kendall's swatches.
While it's all in good fun between the sisters, we think Kylie will be having the last laugh, rolling around in her billions of dollars the Lip Kits have made her.