The 19-year-old stepped out for breakfast with sister Dani Thorne and another friend on May 26, just days after she and Disick, 34, were caught getting handsy while nearly naked.
The actress struggled to grin at cameras as she left in a covered-up outfit following her fallout with Disick.
But trouble erupted after Thorne left Disick's side for one night to attend an event, and later caught him making out with an ex, Chloe Bartoli.
Thorne was humiliated that Disick used her for show in Cannes. She immediately departed the party scene and sent a scathing tweet about their rumored romance on the way back to Los Angeles.
"Yo this #cannes fancy life isn't for me," she tweeted on May 25, following with another tweet the next day, "I'm not talking to scott or anyone else." Since Thorne left, Disick has already had his hands all over multiple women.
An insider close to Kourtney told Radar, "She is completely creeped out by the fact that he is there." Do you feel sorry for Thorne getting in the middle of Disick and Kardashian's drama? Tell us your thoughts below!
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