Jenner has been experiencing trust issues since Thompson and Woods' cheating scandal came to light. Only one week after the news broke that her best friend hooked up with sister Khloé Kardashian's then-boyfriend, Jenner was blaming her own partner of being unfaithful.
Scott strongly denied the claims to PEOPLE.
"Kylie had a rough week," the source says. "She is still devastated about Jordyn and had an argument with Travis after she checked his phone and saw something she didn't like."
However, the source claims, "Travis says he didn't cheat."
So how are the pair dealing now that the accusations are out there? "Kylie was upset at first," she "seems better" now.
"She isn't breaking up with him," the source continues.
Only a few hours after Scott announced he would be rescheduling his Buffalo performance due to illness, TMZ had reported that Jenner's cheating accusations are what prompted him to cancel the show.
Scott remained in Los Angeles when the couple got into an argument.
A rep for Scott also denied to PEOPLE that Scott and Jenner were fighting about cheating, and that he canceled his show for that reason.
Jenner's rep had no comment.
Watch below... Watch below... Travis Scott says he and Kylie Jenner will get married 'soon':