It looks as though Bruce Jenner is very protective when it comes to his daughters. The Keeping Up With The Kardashians star reportedly warned Tyga about treating Kylie Jenner right. The rapper is reportedly dating the 17-year-old, even though they are yet to confirm their relationship.

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According to Hollywood Life on Friday, Bruce told Tyga "exactly what he thinks" about the rapper dating her barely-legal daughter.

A source told the site, "Bruce ain't no joke and he ain't no punk either. He told Tyga straight up, 'that's my baby. If anything happens to her, your a-- is mine.'"

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The source added, "Of course, Bruce and Tyga are cool and Bruce wasn't trying to threaten him. But he wanted to make it clear that Kylie is his little girl and to take care of her."

According to Star Magazine back in September, the 24-year-old rapper has been dating Kim Kardashian's sister after he split up with singer Blac Chyna.

A source tells the website: "Kylie and Tyga started hooking up even before he split from Black Chyna. She played a part in his split from his fiancé."

The insider adds that Kylie's friends and family are worried and think that her relationship with the rapper might be a bad influence on her. She's been reportedly partying at clubs with Tyga with other celebrity bad boys such as Justin Bieber and Chris Brown.

The source added, "She's too young to even begin to comprehend the magnitude of her actions. In a few years, this will come back to haunt her."

Tags: Kylie Jenner