SIL works for the MOD and BIL is in the navy. We were at their house on the military base today and she told me that her neighbour has put her 4 year old daughter into boarding school. I said 'four, that's young' and SIL completely freaked out then stormed away from the table.
I'm not judging their neighbour, I don't even know her, I just said it was young which perhaps in hindsight was insensitive but I do feel she overreacted, aibu?