The C-section story is the latest from writer Walter Isaacson’s new biography of Musk. He interviewed Grimes over the course of shadowing the SpaceX head honcho for three years.
The 32-year-old Grimes, whose real name is Claire Boucher, said he sent it to her father and brothers and didn’t understand why the behavior upset her.
‘He was just clueless about why I’d be upset,’ Grimes told Isaacson in a recently published excerpt published by People Magazine.
In a post on X late Saturday, Musk confirmed his third child with Grimes, a son named Tau Techno Mechanicus, or Tau for short, after a book review in the New York Times first disclosed the child’s existence.
Musk, 52, was already known to share two children with the 35-year-old singer: three-year-old son X Æ A-12, who goes by ‘X’, and one-year-old daughter Exa Dark Sideræl, known affectionately as ‘Y’.
Tau’s age was not disclosed. The revelation came soon after Grimes pleaded with Musk, writing ‘let me see my son’ in now-deleted social media post — but it’s unclear now whether she was referring to Tau, or their older son X.
The Greek letter Tau, styled similar to the letter ‘T’, is derived from the Phoenician letter taw, which was written like the modern letter ‘X’, an apparent obsession of Musk’s. He has changed Twitter‘s name to X since buying the social media platform last year.
Musk dated Boucher for about three years and the couple semi-split in March 2022, though they said at the time they remained on close terms.
The billionaire has had a total of 11 children, including his first-born with ex-wife Justine Wilson, who tragically died in infancy of Sudden Infant Death Syndrome.
Musk welcomed twins with Neuralink executive Shivon Zilis in November 2021, just weeks before Musk and Grimes had their second child via surrogate.
On Thursday, Grimes suggested in a since-deleted tweet that there was strife between her and Zilis, and that Musk was not allowing her to see her own son
According to screenshots of the tweet – underneath a picture of Musk and the two children he shares with Zilis – Grimes wrote a message directed at Musk’s biographer Walter Isaacson.
‘Tell Shivon to unblock me and tell Elon to let me see my son or plz respond to my lawyer,’ she wrote.
‘I have never even been allowed to see a photo of these children until this moment, despite the situation utterly ripping my family apart.’
Musk’s complicated personal life has involved three marriages and three divorces, including two of each with the same woman, and seven children from two long-term romances plus the twins with Zilis they conceived via in vitro fertilization.
Elon started dating Grimes in April 2018, and the eccentric couple captured headlines when they made their red carpet debut at the Met Gala the following month.
Amid a series of breakups and reconnections, the pair welcomed their first son ‘X AE A-XII’ in May 2020.
Their second child Exa Dark Sideræl, who goes by Y, was born via surrogate in December 2021.
Musk had his other children with his ex-wife, Canadian author Justine Wilson.