Marius Borg Hoiby has no royal title or duties, but as the stepson of the heir to the throne, his arrest has cast a cloud over Norway’s popular royal family.

The son of Norwegian Crown Princess Mette-Marit was arrested for allegedly raping a woman in Oslo — his third arrest in a matter of months, according to police.

Marius Borg Hoiby, 27, is under arrest for suspicion of rape involving someone who was unconscious and otherwise incapable of resisting the act, Norway Police announced on Tuesday.