Poppy Bilderbeck
Grimes has taken to Twitter to tell Elon Musk she needs an 'urgent' response about one of their children.
Grimes and Musk share three children - X Æ A-Xii, Exa Dark Sideræl and Techno Mechanicus - from their previous relationship, dating for roughly four years from around 2018 to 2022.
Since parting ways, the 'Genesis' singer - real name Claire Elise Boucher - has continued to distance herself from the Tesla CEO, and recently spoke out about him taking their four-year-old X AE A-XII to the White House and featuring him on live TV.
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AE A-XII - known as Little X - appeared on TV in the background in the Oval Office as Musk - head of US President Donald Trump's Department of Government Efficiency (DOGE) - went to witness the signing of an executive order.
After being alerted to one of her children being on TV by a Twitter user who praised the kid's manners, Grimes wrote: "He should not be in public like this. I did not see this, thank u for alerting me. But I'm glad he was polite. Sigh."
Musk has previously brought Little X on stage at a rally with him and featured him in an interview with right-wing commentator Tucker Carlson
And it would appear there's further conflict within Grimes and Musk's co-parenting after the musician took to Twitter in a series of now-deleted posts on February 20.
She wrote: "Plz respond about our child's medical crisis. I'm sorry to do this publicly but it is no longer acceptable to ignore this situation. This requires immediate attention.
"If you don't want to talk to me can you please designate or hire someone who can so that we can move forward on solving this. This is urgent, Elon."
When a Twitter user suggested 'going public' probably wouldn't help with the situation, Grimes allegedly responded, as per PEOPLE: "I'm not giving any details but he won't respond to texts call or emails and has skipped every meeting and our child will suffer life long impairment if he doesn't respond asap.
"So I need him to f**king respond and if I have to apply public pressure then I guess that's where we're at.
Grimes didn't detail which one of her children is experiencing the 'medical crisis,' and the tweets have since been deleted, so it remains unclear if the issue has been resolved.
LADbible Group has contacted representatives for Elon Musk and Grimes for comment.