Kendall Jenner Sticks Her Tongue In Kylie Jenner’s Mouth in Snapchat Video – Plus See More of Their Most Scandalous Moments

There's never a dull moment when it comes to Kylie Jenner's Snapchat.

The 18-year-old recently posted a video of herself getting ready to (jokingly?) kiss her sister Kendall Jenner, when all of a sudden the 20-year-old sticks her tongue out and it lands right in Kylie's mouth. The video is captioned, "She sucked my tongue… I'm dead."

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This isn't the first time the girls have made headlines together for being overly close. Click through the gallery to see more of their most scandalous moments.