Any parent knows the battle to control their child's sugar intake is real. It's lurking in innocent-looking juices, screaming from the cookie aisle of the grocery store and temptingly nestled in a mound of frosting atop a birthday cupcake. And as it turns out, even princes and princesses want dessert. During her appearance on MasterChef Australia, Meghan Markle shared her response when her two children ask her for a sweet treat. View this post o…