Kim Kardashian is outraged over what she sees as sister Kourtney's lax attitude over Scott Disick's acts of PDA with an ex girlfriend.

Hollywood Life reports Kim is beyond angry at the way Disick has been treating her older sister, but also feels Kourtney should be taking more of "a stand" for herself.

"Kim doesn't understand why Kourtney puts up with Scott's antics," a source added. "It makes her furious to see him treat her like this, but if Kourtney won't stand up for herself, then there is nothing anyone can do."

Over the last several days, the 31-year-old Disick has been snapped appearing "really cozy" with Chloe Bartoli in France, while the 36-year-old mother of his three young children has remained home in California.

The incident hardly marks the first time Disick has been suspected of being unfaithful, including rumors that he has been intimate with sisters Khloe, Kendall and Kylie.

Though Kim is rumored to be beside herself over the latest developments, Hollywood Life adds some other family members are still in denial where Disick is concerned.

"Kris adores him, Khole adores him," a source added. "They will minimize this whole thing about Scott and his ex."

Over the nine years they've been together, a recent report claimed that Disick has cheated on the mother of his children with more than "100 women."

Not long before he left for France, Disick was rumored to have holed up in a New York City hotel with a woman he randomly hooked up with for at least four days.

A friend of the woman later claimed during that time Disick ignored Kourtney's repeated calls and was doing a lot of cocaine. Once she finally figured out what was going on, Kourtney allegedly threatened the father of his children that she would seek custody and he would never see them again.