Blac Chyna has warned ex-boyfriend Tyga keep their 2-year-old son away from 17-year-old rumored girlfriend Kylie Jenner.

Just the days after the "Keeping Up With The Kardashians" star and Tyga were spotted hanging out with little King Cairo Stevenson while visiting Disneyland, 27-year-old Chyna had something to say. Tyga and Jenner were together to celebrate the Kim Kardashian and Kayne West's daughter's birthday.

"Blac told Tyga that she does not want her son to even be around Kylie," a source told RadarOnline. "But there is nothing that she can really do to stop this."

Since Tyga, 25, and the much younger Jenner began dating, she has seemingly quarreled nonstop with his ex. The two have often engaged in a running war on words on social media only made more intense lately by rumors that Jenner and Tyga are now planning to wed.

"Tyga pretty much raises King Cairo and Blac Chyna is only a part-time mother," the source added. "Kylie has taken on a role of second mother to King, but she is in no way prepared to handle the role."

The source alleged Jenner is ill-prepared for such a role partly because she has never had anything like that kind of role model in her own life.

"Kris [Jenner] was so absent for her entire life and the only thing that Kylie knows about how to take care of a kid is to buy their happiness and hire help," the source added.

As for all the chatter about nuptials, Radar reports Jenner and Tyga are planning to elope sometime in August after her 18th birthday. After that, they are hoping for a fresh start away from all the drama.

"They are making plans to quit LA, for a brand new life away from her family and his baby mama," a source told the website, adding that a move to New York City or even Europe are among the possibilities they've kicked around.