of Norway shares two children with the future king - , 20, and , 18. However, the queen-to-be also has a son, 27-year-old Marius, from her previous relationship with convicted felon Morten Borg, and he appears not to be living by the royal rulebook as his younger siblings are doing as heir and third-in-line to the throne. The princess' eldest made headlines earlier this month as he was arrested for "psychologically and physically" attacking a woman in her 20s who was later revealed to be his girlfriend.

According to , Haakon's stepson spent more than 30 hours in police custody on Sunday 4 August following an "incident in an apartment" in Frogner, Oslo, and the woman was diagnosed with a concussion after being admitted to hospital. You may also like In a , Marius said: "Last weekend something happened that should never have happened. I committed bodily harm and destroyed objects in an apartment in the intoxication of alcohol and cocaine after an argument.

" He continued: "I have several mental disorders which mean that throughout my upbringing and adult life, I have had, and still have, challenges. I have struggled with substance abuse for a long time, something I have been in treatment for in the past. I will now resume this treatment and take it very seriously.

" Marius added: "The drug use and my diagnoses do not excuse what happened in the apartment at Frogner on the night of Sunday last weekend. I want to be responsible for what I have done, and will explain myself truthful.