The trio enjoyed a girls' night out at Casa Escobar in Westlake, California, on Tuesday

By K.c. Blumm
Updated July 07, 2015 11:45 PM
Credit: Courtesy Khloe Kardashian

After years of Scott’s troubled behavior, Kourtney put her children first and decided that enough is enough. Subscribe now to get the exclusive inside scoop on how Scott ‘threw it all away’ and why Kourtney finally ended it, only in PEOPLE!

There’s nothing like a girls’ night out to help you get over a bad breakup, and Kourtney Kardashian couldn’t help but smile as she stepped out with her sisters Kim and Khloé on Tuesday.

The trio, who’d worked out together earlier in the day, wore matching white outfits as they headed to Casa Escobar in Westlake, California.

The mom of three – who split with longtime boyfriend Scott Disick over the July 4th weekend after pictures surfaced of him cozying up to another woman in Monte Carlo – wore a halter top that showed off her abs and a crocheted skirt that highlighted her legs.

Khloé shared a photo on Instagram that appeared to be a dig at Disick. The threesome were pictured poking out their tongues along with the caption “IDFWU!!!!!” It stands for “I Don’t F— with You,” which also happens to be the name of a profanity-laden breakup anthem by rapper Big Sean.

RELATED VIDEO: Kourtney Kardashian Breaks Social Media Silence After Split from Scott Disick

Kim shared a number of pics of the siblings taking a selfie on Tuesday night and simply captioned one of them “Sisters.”

For his part, Disick broke his social media silence by Tweeting an invitation for followers to “Come party with me this Friday in Vegas.”

An interesting first move given that many sources close to Kourtney, 36, tell PEOPLE she broke up with the father of her three children because “she was over dealing with his constant lies and addictions,” a Kardashian source told PEOPLE this week. The 32-year-old’s issues with alcohol have been well publicized, and he was in rehab earlier this year. “It was becoming a poor environment for the kids to be raised in, and she refused to let that be the case,” the source added.