"Throne of Humility"

Prompt: Kieran thought sibling rivalry meant stolen clothes and snide remarks—but his sister Ellie has far crueler ideas. Beautiful, merciless, and draped in black tights like a queen with her throne, she turns her brother into something less than family and more than a joke: her personal foot slave. Every command, every humiliation, is another test of how far she can push him before he breaks. But the question isn’t whether Kieran can survive her cruelty—it’s whether Ellie even wants him to.