Kendall Jenner and younger sister Kylie Jenner were supposed to be working on Friday–taking part in a photo shoot that will promote their upcoming spring clothing line. Instead, the Keeping Up With the Kardashians stars spent more time fooling around than they did working, and the result is hilarious.

Recently admitting they don’t get to spend as much time together as they used to, it seems clear that Kylie and Kendall Jenner took this opportunity designed for work as sister time instead.

Kylie Jenner shared the results of that fun on her Instagram page.

“Sissy,” she captioned this shot, referring to Kendall Jenner with the affectionate term.

Sissy

A video posted by King Kylie (@kyliejenner) on Jan 15, 2016 at 10:16am PST

This shot of Kylie and Kendall Jenner didn’t come out clearly, making it abundantly clear that the girls were having a blast. Kylie captioned it, “Lol.”

A video posted by King Kylie (@kyliejenner) on Jan 15, 2016 at 10:13am PST

Kendall Jenner is very busy with her modeling career, and Kylie Jenner is hard at work on a new lipstick line.

All work and no play can make for very sad sisters.

Kudos to Kylie and Kendall Jenner for taking time out of their busy work day to enjoy themselves–and each other, too.