Murilo Huff, singer and father of Leo, the 5-year-old son he had with the late Brazilian singer Marília Mendonça (1995-2021), filed a legal petition seeking unilateral and full custody of his son. Previously, custody was shared with Dona Ruth Moreira, Marília Mendonça's mother, who had been caring for Leo. Huff stated that his request aims to fulfill his paternal role more closely and is not intended to alienate Leo from his maternal family. He cited "serious and alarming situations" and alleged negligence on the part of Dona Ruth, including an incident where Leo, who has diabetes, was reportedly neglected and had to be assisted by Huff himself. Huff also revealed that he covers all expenses related to Leo, including schooling, healthcare, recreational activities, and medical treatments, countering accusations from Dona Ruth that he did not pay child support. The legal dispute intensified with public accusations and defenses from both sides, including criticisms of Dona Ruth's management of Leo's inheritance, which is estimated at around R$500 million (approximately $100 million USD). The dispute also involves concerns about the preservation and use of this inheritance, with Huff expressing worries about potential mismanagement by Leo's maternal relatives. Dona Ruth has denied allegations regarding the inheritance and child support, and her legal team has vowed to present evidence to challenge Huff's claims. The conflict has extended to social media, with family members and associates publicly defending their positions. In a court hearing held on June 30, 2025, a judge granted Murilo Huff provisional custody of Leo, with the child moving to live with Huff. The judge noted a poor relationship between Huff and Dona Ruth, highlighting unilateral actions by the grandmother that disrupted the shared custody arrangement. The decision cited evidence including audio recordings from caregivers that supported claims of negligence and parental alienation by Dona Ruth. Following the ruling, Dona Ruth filed an appeal to contest the provisional custody decision. The case remains under judicial review, with ongoing public and familial tensions. Additionally, the dispute has brought to light controversies involving Dona Ruth's alleged demand for half of the insurance payout from the 2021 plane crash that killed Marília Mendonça and others, a claim she denies and which has been publicly contested by other victims' families. The case continues to attract media attention, with various public figures commenting on the situation.