Elon Musk and Grimes , Secretly Welcome Another Baby.<br />In a 'Vanity Fair' cover story <br />published on March 10, <br />Grimes revealed that she and <br />Musk had another child together.<br />Their daughter, Exa Dark Sideræl, was born in December 2021 via surrogate.<br />They refer to the baby as Y, similarly to how they call her older brother, X Æ A-XII, X.<br />Y was born months after the singer <br />and tech mogul broke up.<br />In the 'Vanity Fair' interview, Grimes said the couple was back together in their own way.<br />I would probably refer to him as my boyfriend, but we’re very fluid. We live in separate houses. We’re best friends. We see each other all the time. … We just have our own thing going on, and I don’t expect other people to understand it, Grimes, via 'Vanity Fair'.<br />'Page Six' reports Musk and Grimes told 'Vanity Vair' they've "always wanted at least three or four" kids.<br />Musk also has five sons with <br />ex-wife Justine Wilson.<br />However, shortly after the 'Vanity Fair' story was published, Grimes revealed the couple broke up yet agin
