Marius Borg Høiby, the 29-year-old son of Norway’s Crown Princess Mette-Marit, will remain in pre-trial detention after an Oslo appeals court on Wednesday reversed an earlier decision to release him on bail. The Borgarting Court of Appeal concluded that there remained “a strong probability” he would commit new criminal offences if freed, siding with prosecutors who had urgently appealed Monday’s lower-court ruling that would have let him await next week’s verdict at the royal residence.

Høiby’s legal team had argued that his mother’s rapidly deteriorating health — she suffers from severe pulmonary fibrosis and has been placed on a waiting list for a lung transplant — entitled him to spend the final days before judgment at the family estate of Skaugum. The Oslo district court had accepted that humanitarian plea, ordering his conditional release. However, the prosecution immediately challenged this, insisting that the risk of repeat offences outweighed filial considerations, a stance the appellate panel endorsed without hesitation.

Viewed from Stockholm and Copenhagen, the case has gripped a region where Scandinavian royal families typically command deep public trust. Swedish and German newspapers have chronicled the downfall of a figure dubbed the “bonus prince”, who, despite holding no official title, grew up in the glare of the monarchy’s public life. Italian news agencies on Wednesday framed the reversal as a stark blow to Høiby’s defence, noting the gravity of the charges — a sprawling indictment encompassing multiple counts of rape, assault and other offences, with a total of around 40 charges. Across Nordic media, the affair is testing the boundaries of royal privilege at a moment when the institution’s moral authority is already under quiet scrutiny.

The three-judge appellate panel, according to Norwegian state broadcaster reports, found that Høiby’s pattern of behaviour combined with ongoing investigations made fresh criminal conduct “highly likely”. His lawyers, while “disappointed”, announced they would not challenge the decision further, signalling a tactical retreat ahead of the verdict due on Monday. That judgment will be the culmination of a mammoth trial that has laid bare allegations stretching over several years and involving multiple alleged victims.

As Norway braces for the ruling, the monarchy confronts a delicate balancing act. Should the verdict go against Høiby, King Harald’s family will have to manage the unprecedented spectacle of a crown princess’s son potentially serving a prison sentence while his mother battles a life-threatening illness. Even an acquittal may not erase the reputational damage inflicted by weeks of damaging testimony. For a house that has long relied on a carefully curated image of modest, modern royalty, the coming days could redefine the boundaries between public duty and private crisis.