A 16 year old boy is angry, aggressive, and violent towards people and property. Think smashing TVs, and punching and kicking people in the face/head - violence that a grown adult male can’t control. The police have been involved with respect to some (but not all) assaults he has carried out on separate occasions including on his mother and younger siblings. The 16 year old’s mother has a boyfriend with primary school-aged children and they holiday together with her children including the violent son. I don’t know if the mother of these primary school-aged children is aware of the full story. My gut tells me she has a right to be fully informed and so I should check, but, equally, I’m worried about coming across as shit stirring. AIBU to message her to ask if she’s aware of the risk of harm to her children from this 16 year old?