Writing a kinky messy diaper girl dom story requires a lot of thought about the relationship between the characters. Begin with setting the scene, perhaps in a private, fetish - friendly space. The girl dom should be confident and assertive. For the'messy diaper' aspect, it could be incorporated as a form of expression of her dominance. For instance, she might make her submissive wear a diaper in public (in a fictional and consensual BDSM - friendly world) as a way to show who is in control. Develop the story with their conversations, reactions, and how they navigate this unique relationship dynamic.