AceShowbiz - Kourtney Kardashian was not happy. She could soon take drastic measures to control her son Reign's social media presence following his unexpected appearance on an Instagram live.

During a livestream with stepsister Alabama Barker's boyfriend, Scooter Jackson, Reign addressed a wild conspiracy theory suggesting that his real father is pop sensation Justin Bieber. The 10-year-old confidently declared, "Bro, I swear, Justin Bieber is not my dad... Scotty is my dad."

Following Reign's unexpected remarks, Kourtney was reportedly "livid" about the incident. An insider revealed that Kourtney is cautious about her children's online activities and fears they might inadvertently disclose private family matters.

"If he continues to do it, it is only a matter of time before he says something damaging," the source told DailyMail.com. Kourtney has already discussed her concerns with Reign, emphasizing the potential impact of his words and the public scrutiny they might invite.

Adding to Kourtney's frustration, Scott Disick, Reign's father, was reportedly upset after Reign casually referred to him as "Scotty" during the live stream.

The rumor that Reign could be Bieber's son has circulated for years, stemming from Bieber's known association with the Kardashian family and his brief period of closeness with Kourtney back in 2016. Bieber himself had dismissed these speculations by referring to Kourtney simply as "great" during a past interview.

Further complicating matters, Kourtney has had previous issues with Alabama Barker's influence over her children. Just last month, Kourtney had to step in during Alabama's feud with Bhad Bhabie when Reign's younger brother, Rocky, was dragged into the argument.

Kourtney herself recently took to Instagram to set the record straight in response to the increasing rumors and speculation about her family, including unfounded claims regarding her eldest son Mason allegedly having a daughter named Piper.

She urged the public to respect their privacy, stating, "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."