Referee or Coach? What Sibling Fights Are Actually For

The referee's three rules

• Stay out more than feels natural. Fights between roughly-matched siblings over ordinary stakes are coursework — every adult verdict is a rep they didn't get. Intervene for safety, cruelty, and pile-ons; spectate the rest from a distance.
• When you do step in: no tribunals. You didn't see it, both witnesses are lovingly biased, and the investigation rewards the better lawyer. Stop the harm calmly, tend any hurt party first and visibly, and reset — "you two, separate ends of the sofa, try again in five minutes" beats a verdict nine times out of ten.
• Coach the repair, skip the forced apology. A marched-out "sorry" teaches performance. A coached redo — "what could you do to make it right with her?" — teaches repair, which is the actual life skill. Fours can fetch the knocked-over tower's first brick; twelves can manage a genuinely decent restart.

Two habits do quiet long-term work: never compare ("why can't you be more like your sister" converts a rivalry into a resentment, and labels — the kind one, the difficult one — assign parts that get played), and teach the house standard once: you don't have to like each other every day; you do have to be decent to each other every day.

The line where it stops being coursework

Ordinary sibling conflict is two-way, roughly matched, and mixed with alliance an hour later. Take a different pattern seriously: one child persistently targeted by another with a real power gap; cruelty that is deliberate and unrelenting; a child becoming frightened of a sibling; or anything sexual or involving weapons. That isn't rivalry — treat it with the seriousness you'd give it between unrelated children, and bring in help early: your GP, the school, and where safety is in question, the safeguarding routes. Protecting both children — including the one doing the harming, who needs help too — is the job, and it's not one to carry alone.