Somewhere over the Indian Ocean, a mother and her infant son became the unlikely centre of a debate that air travel has long avoided: who truly belongs in the premium cabin. Charlotte Heinrich, a jewellery designer flying business class between Singapore and Australia, was confronted by a fellow passenger who insisted that mothers with babies have no place among those who pay for quiet. The incident, which reached 135,000 people online, is less about one crying child than about the unresolved question of whether luxury, once purchased, entitles a person to a world shaped entirely around their