It looks as though Kourtney Kardashian is trying to keep her little sister Kendall Jenner safe from Hollywood's bad boys. According to a new report, Kardashian has apparently told her sister to stay away from "attached men" in the entertainment world.

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According to OK! Magazine on Friday, Kardashian allegedly gave Jenner a stern warning as far as who she should and shouldn't date, which includes the likes of Chris Brown and Justin Bieber.

A source told the mag, "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. She totally tore into her over it, begging her to wake up and stop it right now before she gets an even worse reputation."

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Kardashian also reportedly told Jenner to stay away from married men, out of respect for her sister Khloe Kardashian, who was cheated on by her ex-husband Lamar Odom.

The insider added, "Kourtney pointed out that with all the hell Khloe's been through with a cheating husband, Kendall should know better. It just doesn't look good."

Meanwhile, it looks as though Kendall is trying to distance herself from her family. Rumor has it that the 18-year-old aspiring supermodel is trying to "distance" herself from her Kardashian sisters and the fanfare that goes everywhere they go, too.

According to Yahoo Australia on Tuesday, Kendall has made great strides in trying to establish herself as a serious model in the fashion world by moving as far away as she can from her family.

A source said, "She's moved out of the family home into her own LA apartment. With Kim and Kanye living there, everything felt too crazy and she's keen to scale back her involvement in the reality show. Kendall loves her sister Kim but feels uncomfortable with the fanfare that accompanies her."

Tags: Kendall Jenner