"I'm not at liberty to speak on these things."

Exa Dark Sideræl

We certainly didn't see this one coming.

Acclaimed musician Claire "Grimes" Boucher and SpaceX CEO Elon Musk had a second child with the help of a surrogate mother in December, according to an unhinged new Vanity Fair interview.

Just like her first child with Musk, Grimes' new daughter has an eyebrow-raising name: Exa Dark Sideræl Musk, or "Y" for short.

Exa Dark Sideræl is Musk's first daughter, after having seven sons. The last one — X — was also with Grimes.

It's a pretty wild interview to say the least. In fact, Grimes didn't even lead the interview with the news she had another child with Musk.

"Full-blown infant screams upstairs" gave Y's existence away.

"I'm not at liberty to speak on these things," Grimes told Vanity Fair at first, clearly trying to move the conversation in a different direction.

X and Y

The couple had their first child together in May 2020, naming it "X Æ A-12 Musk" — truly a mouthful — and later changed it to "X Æ A-Xii," or "X" for short.

After dating for three years, the couple broke up in September 2021.

"We are semi-separated but still love each other, see each other frequently and are on great terms," Musk told gossip outlet Page Six at the time.

Things are still a little complicated between the two. And don't forget that Musk is reportedly dating someone new.

"I would probably refer to him as my boyfriend, but we’re very fluid," Grimes told Vanity Fair more recently. "We live in separate houses. We’re best friends. We see each other all the time."

READ MORE: “Infamy Is Kind Of Fun”: Grimes on Music, Mars, and Her Secret New Baby With Elon Musk [Vanity Fair]

More on Grimes: Elon Musk and Grimes Just Broke Up After Dating Three Years

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