Kylie Jenner "had an argument with Travis after she checked his phone and saw something that she didn't like," a source tells PEOPLE

Kylie Jenner has experienced trust issues amid the Tristan ThompsonJordyn Woods cheating scandal, a source tells PEOPLE.

A week after news first broke that Jenner’s best friend Woods hooked up with Khloé Kardashian’s then-boyfriend Thompson, TMZ reported on Thursday that the Kylie Cosmetics mogul, 21, had accused her own boyfriend, Travis Scott, of cheating. A rep for the rapper went on to strongly deny to PEOPLE that he was unfaithful.

“Kylie had a rough week,” the source says of the drama. “She is still devastated about Jordyn and had an argument with Travis after she checked his phone and saw something that she didn’t like.”

However, according to the source, “Travis says he didn’t cheat.”

As for what’s next for Jenner and Scott’s relationship, the source says that although “Kylie was upset at first,” she “seems better” now.

“She isn’t breaking up with him,” the insider adds.

61st Annual Grammy Awards, Arrivals, Los Angeles, USA - 10 Feb 2019
Travis Scott and Kylie Jenner
| Credit: Chelsea Lauren/REX/Shutterstock

Hours after Scott announced on Twitter that he would be rescheduling his show in Buffalo due to illness, TMZ reported that Jenner’s cheating suspicion had actually prompted the rapper to cancel the show and remain in Los Angeles, where the couple reportedly got into an argument.

In addition to denying Scott had been unfaithful, a rep for the rapper also strongly denied to PEOPLE that Scott and Jenner had a fight about cheating. A rep for Jenner had no comment.

During Friday’s episode of Jada Pinkett Smith‘s Facebook Watch talk show, Red Table Talk, Woods, 21, admitted to kissing Thompson, 27.

Opening up about her hookup with Thompson for the first time, Woods acknowledged that she didn’t immediately tell the truth to Jenner and Kardashian after what happened.

“I had talked to Kylie and Khloé in the morning and I told them I was there. I had talked to Khloé and she asked me what was going on, was everything fine? And in my head of trying to forget that part of the story, I was like, ‘You know, no he was chilling, everything was okay. There were girls there but he wasn’t all over the girls,’” she said.

“I was honest about being there, but I wasn’t honest about the actions that had taken place,” she added, claiming that she was “trying to protect Khloé’s heart.”

RELATED VIDEO: Kylie Jenner Steps Out for First Time Since Allegations Tristan Thompson Cheated with Jordyn Woods

Shortly after Woods’ interview was posted online, Kardashian — who has unfollowed Woods on Instagram — slammed the model for lying.

“Why are you lying @jordynwoods ?? If you’re going to try and save yourself by going public, INSTEAD OF CALLING ME PRIVATELY TO APOLOGIZE FIRST, at least be HONEST about your story. BTW, You ARE the reason my family broke up!” she wrote.

Minutes later she added, “Tristan is equally to blame but Tristan is the father of my child. Regardless of what he does to me I won’t do that to my daughter. He has been addressing this situation PRIVATELY. If Tristan were to lie publicly about what conspired,then yes I would address him publicly as well.”

Kardashian has since unfollowed Thompson on Instagram.

However, in a series of emotional tweets on Saturday, Kardashian revealed that she’d had a change of heart, as she placed the blame fully on Thompson.

“This has been an awful week & I know everyone is sick of hearing about it all (as am I). I’m a rollercoaster of emotions & have said things I shouldn’t have,” she wrote. “Honestly, Tristan cheating on me & humiliating me, wasn’t such a shock as the first time.”

“What’s been harder & more painful is being hurt by someone so close to me. Someone whom I love & treat like a little sister. But Jordyn is not to be blamed for the breakup of my family. This was Tristan’s fault,” she added in a follow-up tweet about Woods.

The mother of one went on to share that she wants to focus on her “blessings,” which include her 10-month-old daughter True, whom she shares with Thompson.

“I have to move on with my life & count my blessings, my family, my health, & my beautiful baby True,” she wrote.

While Kardashian has obviously been hurt by the scandal, one source previously told PEOPLE that “it’s much more difficult” for Jenner.

“She has basically lost part of her world,” said the source. “She is very, very upset. She always trusted Jordyn with everything.”

The two have been best friends since high school, with Woods moving in with Jenner in recent years (she has since moved out), accompanying her on lavish vacations and helping take care of Jenner’s 1-year-old daughter Stormi. Woods and Jenner even got “married” with a commitment ceremony on a trip to Peru together that was chronicled in the season finale of Life of Kylie in September 2017.

“Kylie just can’t make sense of what happened,” the source said. “She still has so many questions for Jordyn.”