forced to lick feet

Hello, my request would be a story where the protagonist lives in some way (schoolmates, roommates, or stepbrothers) with the other protagonist, with whom he gets along badly and they fight a lot, at one point the protagonist dominates the protagonist with ballbusting, until the other agrees to obey her and then clean his feet with his tongue, totally humiliated.

posd: I don't speak English well so I hope you have been able to understand the text well