Kourtney Kardashian is still upset with former partner Scott Disick for getting cosy with an ex-girlfriend in the South of France during the summer and says she won't forgive him.

The 36-year-old reality TV star broke up with long-time boyfriend in July after the incident and has no plans to rekindle their relationship.

"She will never forgive him for putting her through that. She's 100 percent done," A source close to Kardashian was quoted as saying by Star magazine, reports femalefirst.co.uk.

"This time it's for real. Kourtney has forgiven Scott countless times before, but everyone knew there would be a point where she wouldn't be able to. She wants him to get better for the kids, but his what happened over the summer was the last straw," the source added.

According to the source, the 32-year-old businessman regretted his actions while in rehab.

"Being in rehab made him see how much his family, especially Kourtney, means to him and how he took them for granted," the source said.