AceShowbiz -

Kourtney Kardashian doesn't seem to approve of Scott Disick and Bella Thorne's relationship. The "Keeping Up with the Kardashians" star is said to be disgusted and embarrassed at Scott as she feels he's only "using" Bella because she's young.

It is said that Kourtney expects Scott to be more mature. "Kourtney thinks it's gross that Scott is parading around with Bella Thorne [again], and she is disgusted and embarrassed that he is carrying on with a girl that is 19 years old," a source tells HollywoodLife.com. "She wishes that Scott would be an adult and is at a loss. She's also fearing the worst."

The mother-of-three seems to believe that her ex is hooking up with the "Shake It Up" alum only because she's young. "The difference between Younes Bendjima and Bella and all these girls that Scott is hooking up with is that Kourtney actually sees a future with Younes, where she honestly believes that Scott is using Bella because she is young," the source shares. "Kourt would agree that it would be a double standard, but she has more feelings for Younes - it's not just a hot hookup."

Although Kourtney sees a future with the 24-year-old former boxer, it is said that their reationship isn't her priority. "Since her Europe trip with Younes, Kourtney has been laying low," an insider tells PEOPLE. "She hasn't seen Younes recently. She isn't focused on dating."

Kourtney and Younes were last seen together during their trip to Cannes where they allegedly had a "wild sex." Scott, who was also in Cannes at the time, got cozy with several different women including Bella, ex-girlfriend Chloe Bartoli, previous rumored girlfriend Ella Ross and Sofia Richie.