United Kingdom, Feb. 17 -- Elon Musk's eldest daughter found out about her new half-sibling online.

Conservative influencer Ashley St. Clair claimed a few days ago she had given birth to the Space X founder's 13th child five months ago and 21-year-old Vivian Wilson - who the tech mogul has with ex-wife Justine - has joked it isn't the first time she hasn't been told directly what is happening in her father's personal life.

She wrote on a post shared to TikTok: "Wow, if I had a nickel for every time I found out I had half-siblings through Reddit, I'd have two nickels. which isn't a lot but it's weird that it's happened twice, right."

Vivian, who changed her name in 2022 to reflect her trans identity and to distance herself from her fath...