Grimes’ Mom Claims Elon Musk Is ‘Withholding’ Couple’s 3 Kids from Visiting Their Dying Great-Grandma in Canada

Grimes’ mother has accused Elon Musk of “withholding” the couple’s children and preventing them from visiting their ailing great-grandmother in Canada.

Sandy Garossino — the mother of the Canadian musician, 36, born Claire Boucher — made the claims in a “grandmother’s plea” that she shared in a thread of several posts on X (formerly Twitter) on Saturday, July 27.

Garossino, a columnist for Canada’s National Observer, formatted the plea like a letter, beginning, “Dear Elon @elonmusk It was nice seeing you on Father’s Day. I hope you got the card that I helped X make. He was so proud of it.”

“I’m writing here as the only way I have to reach you,” she wrote. “As you know, my 93 year old mother is now at end-of-life palliative care. She yearns to see and hold Claire’s children one last time. Especially the youngest, whom she has not yet met.”

The journalist went on to say that her mom was “thrilled” to see the ex-couple’s three young children — X Æ A-Xii, 4, Exa Dark Sideræl, 2½, and Techno “Tau” Mechanicus — on her birthday on Saturday, “but those hopes were crushed when the trip was canceled.”

“I am alarmed to learn that the children cannot come as you are withholding them and their needed passport documents from Claire,” Garossino claimed. “It was even more troubling to see you and X on television at the Olympics in Paris yesterday, after your DC trip earlier in the week.”

“Where are the other children, and with whom? They are scheduled to be with their mother,” she continued. “They were expected here in Canada.”

Garossino went on to say that she is writing “with a grandmother’s plea, asking you to honor your agreement, return the children, and provide the documents they need to see their great grandmother before she passes.”

“Some moments in life last forever, and we get no second chances,” she added. “Family is priceless.”

In her last post, Garossino added a final ask to the 53-year-old Tesla CEO. “Please Elon, I beg you. This is so painful for my mother, and concerning for the kids,” she wrote. “Time is of the essence now.”

Representatives for Musk and Grimes did not immediately respond to PEOPLE’s request for comment.

Never miss a story — sign up for PEOPLE’s free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer​​, from celebrity news to compelling human interest stories.

Grimes and Musk were first romantically linked in May 2018. They were in an on-and-off relationship before breaking up for the final time in March 2022.

After appearing on the cover of Vanity Fair — and telling the magazine that she and Musk had resumed their “very fluid” relationship — the “Oblivion” singer announced the split with a post on X.

“Me and E have broken up *again* since the writing of this article haha,” she wrote, “but he’s my best friend and the love of my life, and my life and art are forever dedicated to The Mission now, I think Devin wrote that part of the story rly well. Sique – peace out.”