Grimes has filed a court petition over her three children with ex-boyfriend Elon Musk.

The musician, whose real name is Claire Boucher, filed the petition on Friday to establish parental relationship, according to court records. While the details are still unclear due to the filings being private, the petition effectively requests a court order that identifies a childs legal parents and is usually required when the parents of a child are unmarried.

Such petitions are often filed alongside demands for custody rights or child support, though it does not appear that the Oblivion singer has made such requests as of Tuesday.

Grimes and Musk have three children together over the course of their on-and-off relationship, which began in 2018 after they connected on Twitter. Musk acquired the platform last year for $44 billion , renaming it X and coming under heat for loosening regulations and enabling hate speech on the site. Grimes, 35, and Musk, 52, have never been married to each other.

The Tesla CEO is currently a father of 11. Musk had six children with his first wife, Justine Wilson, before welcoming son X A-12 with Grimes in May 2020. The two split up in September 2021, only to briefly reunite and have daughter Exa Dark Siderel , nicknamed Y, via surrogate.

Weeks before Ys arrival, former Neuralink executive Shivon Zilis gave birth to Musks twins Strider and Azure. The twins birth was not made public until the following year . Musk reportedly ended his relationship with Grimes for a second time at the start of 2022.