Twin X is sitting peacefully on his own reading or playing, enjoying a rare moment of his own company
Twin Y launches himself at X in a playfully intended wrestling move
Twin X, furious at being interrupted, punches and pinches Y as hard as he can leaving a really nasty bruise.
How do I sort this out? Happened for 2nd time this morning. Don't know what to do- both times twin Y has been so very upset because in pain at X's attack that I haven't really addressed his role in provoking the scenario at all. Feel like I can't say "What did you expect, Y?" because that would seem to justify really nasty reaction from X. But have real sympathy at X's outrage in some ways- everyone needs a bit of time to themselves, twins more than most probably. Please advise, oh wise ones.