Mistress always comes up with creative new ways to ruin her powerless little diaper girl, Harley! The two are both enjoying wearing wet diapers together when Mistress gets the idea to mess hers while sitting on Harley's face. Harley is excited by the idea, bracing herself under Mistress's ass to witness the bulge! Mistress smooshes the slave's face into her messy diaper, telling her "dirty girl" to smell it! Mistress decides Harley should have a messy diaper, too, so she handcuffs Harley to the shower and gives the girl a massive enema. Since Harley's diaper is already soaked to capacity, Mistress removes her own messy diaper and puts it on Harley. The girl whines and squirms at the sensations. It doesn't take long for the enema to do its thing, and Harley floods the adorable baby diaper, staining it and filling it up! Mistress humiliates the girl, squeezing and patting her stinky padded butt. Mistress frees Harley from her handcuffs and lays her on the floor, seemingly preparing her for a change. Despite the slave's desperate pleading, Mommy decides to be cruel, denying the pathetic fussy babygirl her change, wrapping her full diaper back up and sending her stinky butt to bed.