Princess Cadance isn't an emotionally driven pony. She likes to think that she's done a good job keeping those pesky emotions in check, especially during her weekly court. But when a crystal pony calls her 'useless', it gets to her. She'd never been called useless before by anypony, let alone one of her subjects.
Luckily, she has the best aunt in the world there to comfort her.
Written for Flutterpriest, bae of all baes.