A woman who alleged Elon Musk fathered her baby said he offered her $15 million to keep the birth a secret.

Ashley St Clair, 26, claimed the tech billionaire offered her the fee along with a $100,000 monthly stipend until the child reaches the age of 21 as part of a deal to muzzle her, according to the Wall Street Journal (WSJ).

Mr Musk is thought to have at least 14 children with four women including the pop musician Grimes and Shivon Zilis, a Canadian executive at Neuralink, his neurotechnology firm.

Jared Birchall, Mr Musk’s right-hand man, told Ms St Clair that the deal was similar to what Mr Musk had agreed with the other mothers of his children, the report claims.

The Tesla boss is said to have demanded she deliver the baby via caesarean section, believing the procedure allows for the child to develop a larger brain, and not to circumcise the baby if it was male.

Ms St Clair, a conservative influencer, did follow through with his request to keep his name from the birth certificate, according to the newspaper.

Mr Birchall is said to have demanded that the new mother sign an agreement keeping Mr Musk’s paternity a secret in exchange for $15 million and $100,000 a month.