After the mess that was Khloe Kardashian and Lamar Odom, and may still be, rumor has it that sister Kourtney Kardashian is trying to be the level-headed one in the bunch.

OKMagazine reports that Kourtney, who is in a long-term relationship with Scott Disick that has produced two children and a third on the way, has warned little sister Kendall to check herself and stay away from men who are taken.

“Kourtney’s worried over Kendall’s choice in men and can’t believe she’d so blatantly steal or even flirt with another girl’s guy,” the insider told OK. “She totally tore into her over it, begging her to wake up and stop it right now before she gets an even worse reputation.”

This insider reportedly linked Kourtney’s advice directly to the difficulties that their sister had gone through with Odom.

“Kourtney pointed out that with all the hell Khloe’s been through with a cheating husband, Kendall should know better,” the insider said. “It just doesn’t look good.”

The sisterly advice supposedly comes on the heels of some social media buzz about Kendall going to dinner with Justin Bieber, who was linked with Selena Gomez at the time. The dinner sparked a strong reaction from Gomez, after which Bieber has reportedly been trying to get back in her good graces.

Hollywood Life reports that Gomez regrets “overreacting,” according to another insider.

“She hasn’t said that she’s going to take him back but that’s usually how it goes once they get back in touch. She’s been saying stuff about how she overreacted and how she has to take responsibility for her part in things so it definitely seems like she’s opened her heart up to him again.”

When Time Magazine listed Kendall and Kylie Jenner among their Top 25 Most Influential Teens of 2014, right among names like Sahsa and Malia Obama, Nash Grier (founder of Vine), and hero Malala Yousafzai, a backlash ensued.

According to the Daily Mail, the Jenner sisters were not welcome alongside the likes Malala, transgender pioneer Jazz Jennings, and chef Flynn McGarry.

Please explain why Kendall & Kylie won most influential teens??? I don't understand

— A (@alexchojnowskii) October 25, 2014

Just found out that Kendall and Kylie Jenner were above Malala yousafzai in Time's most influential teens… I'm sad now…

— emily esail (@mittenluver123) October 23, 2014

"kendall and kylie jenner also named TIME's most influential teens alongside malala yousafzai" now that's just embarrassing, TIME

— ѕρσσку ѕєνєη (@Virescence) October 16, 2014

Perhaps this kind of bad press is what Kourtney had in mind when she advised her sister to watch her behavior. It is one thing to have a loyal following of KUWTK fans who keep feeding that machine. But to step out and risk ruining other high-profile relationships can invite scrutiny that can bring down empires.