Watch: Scott Disick Reveals His Dating Advice to 15-Year-Old Son Mason Disick on "Hook Ups"

Kourtney Kardashian has been keeping up with the internet -- and she has something to say about it.

After rumors surfaced online that Kourtney's 15-year-old son Mason Disick -- whose dad is Scott Disick -- had recently welcomed a child, the Kardashians star shut down the chatter.

"I rarely address rumors or conspiracies regarding myself or my family, but this is about my child and it feels wrong to let anyone think for a second that these lies are remotely true," she wrote in a March 2 Instagram Story. "They are not. Mason does not have a child. These accounts that pretend to be him are definitely not. They are FAKE."

The 45-year-old -- who also shares Penelope Disick, 12, and Reign Disick, 10, with Scott, as well as 15-month-old son Rocky Barker with husband Travis Barker -- went on to note that her oldest child has kept largely out of the spotlight.

"My son really values his privacy, and I am asking all media to please be respectful: he is a kids with feelings and a beautiful life ahead of him," she added. "Please stop spreading false narratives and spinning lies."

Kourtney ended her message by addressing social media users directly, adding, "And to all the other people making videos about my kids (who, by the way, are minors), please stop and leave them alone."