Kardashian's longtime boyfriend is nowhere to be seen in photos she posted from her celebration

By Adam Carlson
Updated July 05, 2015 10:15 AM
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Courtesy Kourtney Kardashian

Kourtney Kardashian spent her Fourth of July beachside with the kids, all sun and smiles amid the news that longtime boyfriend Scott Disick had allegedly fallen off the wagon and was partying with another woman.

Kardashian, 36, posted photos of her celebration with daughter Penelope to Instagram Saturday night.

“4th of July!” she captioned one photo, with heart and sun emoji.

Another shot showed the twosome posing in front of a beach.

Meanwhile, Disick, 32, was spotted earlier this week cozying up to a former flame (stylist Chlose Bartoli) while vacationing with friends in Monte Carlo.

He and Kardashian have not been communicating, either, a source told PEOPLE – each has been ignoring the other’s messages.

Can Kourtney Trust Scott?

Disick’s battle with substance abuse has been a subject of his Keeping Up with the Kardashians role, and multiple sources now say he’s fallen off the wagon, an echo of the disappearing act he pulled following the December birth of his third child with Kardashian, son Reign.

“He’s just making things worse and worse, and what’s worse is that he knows that he’s making it worse and worse,” a source told PEOPLE.

“His head knows that he needs to leave, and that every minute that he’s there, he’s doing more damage to himself and his family, but until he really takes that to heart, he’s not going to make a change.”

Reporting by STEVE HELLING and AILI NAHAS