Kendall Jenner and younger sister Kylie experience most of the ups and downs of typical siblings. They’ve made news recently for fighting over clothing, which isn’t unlike most sisters either.

The Keeping Up With the Kardashian stars also experience a wealth of things that many sisters can’t begin to fathom. There is an endless supply of money and a list of celebrity friends a mile long. There is one thing Kylie and Kendall Jenner experienced recently that many sisters wouldn’t want to fathom, however, and it’s making its rounds on the internet. Kylie recently sucked on sister Kendall Jenner’s tongue.

WATCH: @KylieJenner GOBSMACKED by sister Kendall when she sticks her TONGUE in her mouth: https://t.co/QLRUNwt7ve pic.twitter.com/ZVMfzi5awJ

— OK! Magazine (@OK_Magazine) November 17, 2015

Would anyone care to fathom a guess as to what that was all about?

“She sucked my tongue…I’m dead,” Kendall Jenner tagged a Snapchat image of the sisters–with Kylie’s tongue in Kendall’s mouth.

Kylie and Kendall Jenner are in Sydney, Australia promoting their clothing line–Kendall+Kylie–and they seem like they’re getting along.

In a recent promo for the new season of Keeping Up With the Kardashians, Kendall Jenner called Kylie “the biggest f*cking bitch” over a dress she wanted to borrow, but Kylie Jenner wasn’t having it. Kendall also told dad Caitlyn Jenner, “[Kylie] doesn’t have her priorities straight, and I tell everyone that.”

Okay, so most of this stuff between Kylie and Kendall Jenner sounds normal.

SCANDALOUS! Watch #KendallJenner and #KylieJenner's 'lippy' Snapchat video: https://t.co/6CflT6gi7r pic.twitter.com/TNbwBGu5Nm

— Life & Style (@Life_and_Style) November 17, 2015

What’s your take on Kylie sucking Kendall’s tongue?

Are you among those who find that a little bit odd–and very definitely disgusting?