Just like a firework, Kourtney Kardashian and Scott Disick’s romance fizzled out over the Fourth of July weekend when controversial photos of Scott surfaced to the Internet. In the images, the 32-year-old "Keeping Up With the Kardashians" reality star was seen cozying up to his ex-girlfriend, Chloe Bartoli, in Monte Carlo.

“It was the last straw,” a source of the former couple told People magazine. According to the insider, Scott was supposed to use his time traveling to “process things, presumably with the end game of fixing their relationship."

Throughout the duo’s nine-year relationship, they’ve faced their fair share of struggles, from battling Scott’s drinking issues to cheating accusations. But it seems as though his latest stint was what ultimately pushed Kourtney, 36, to end their tumultuous relationship.

"Kourtney knew he was going on the trip,” the source revealed to People magazine. “They both thought this could be a chance to breathe and work on things. She didn't mean that he should be rubbing lotion on another woman's back." The woman Scott was caught lathering up happened to be the woman he dated before he committed to Kourtney in 2006, according to Us Weekly.

Kourtney wasn’t the only one shocked to see the images of Scott with his ex-girlfriend. During an interview with NBC’s “Today” show, Kourtney's stepbrother Brody Jenner stated he was taken back when the photos hit the Internet. "Honestly, when I saw those pictures, I went, 'Uh-oh. This isn't good,'" he said. "It's unfortunate."

But a source told E! Online that Kardashian is “over it.” 

“She's fed up. It's humiliating and disrespectful. How much more is she supposed to take?" the insider questioned, adding that the mother of Scott’s children (Mason, 5, Penelope, 2, and Reign, 6 months) wants to do what’s best for her kids. "Kourtney has always taken Scott back and been by his side, but now with three kids it has gotten old," the friend of the duo said to E! Online.