One of the brothers were convicted of beating his partner IIRC.
I think it was Espen and it happened around the time MM came on the scene. If I recall right it happend on his 40th birthday - he kicked his girlfriend, she fell and broke a finger or something like that. In court it was claimed that he kicked her again after she fell. He claimed that he was pretty stressed out because of all the media attention the hole family got. Let's give him the benefit of doubt that he was not a habitual women abuser like his nephew seems to be. Of course it was wrong, but it happened 22 years ago and there do not seem any further convictions.
Both brothers appear to be successful in their professional careers. It again indicates that there were mainly educated middle class values promoted in the family, both parents had an education. We can't say anything about the sister, but she looks healthy and normal, if she had gone terrible wrong (drugs, alcohol, ...) she would not look like that, so I make the bold claim that her life was very normal. We can't find anything about her which means she cleverly stayed out of the limelight all these years as she still seems to live in Norway. That, IMO, also indicates that she leads a pretty normal life.
MM was born in 1973, the parents divorced in 1984, I think her brothers are older than her, so the parents must have been married for nearly 20 years, I guess.
I would assume it was a pretty normal family. After all, you only have four children if you enjoy parenting and family life. The mom seems to have stayed in one place, Kristiansand all her life.
The mother later remarried after the divorce, one of her second husband's sons was a policeman or security guard and was shot in the assassination attempt, which probably saved his own son on the island. I remember MM being very upset at his funeral, which IMO indicates among other things that the step-siblings shared a bond and the patchwork constellation worked within the family, even though they were surely nearly grown-up after their parents married.
MM's mom's second husband died after well over a decade of marriage and a few years later she presented a new partner, who died recently of old age. Both men she was with after husband #1 seemed very normal (behaviour and look wise) from the glimpses we saw and she seemed very steady in her relationships. Both men seemed to have lead a very normal life and stayed out of the royal circus.
So let's assume it was MM's dad who -forever what reason- lost the plot and they divorced and he showed all kind of "funny" behaviour afterwards which might have well been the reason that marriage ended. MM seems to have had a lot of positive influence in her lives, God knows why she chose the path she chose and surrounded herself with criminals while she lived in Oslo.
