I'm looking for this story about forced regression, with a girl character named "Holly" or something.
It's about a girl who got locked up into her room after she did something bad, and her parents got her a nanny and then went abroad. The nanny then started to force-regress her, making her sleep in plastic pants with one of those wetting indicator devices.
At some point she even sent her to school in really childish clothes, and everyone bullied her. By the end of the story she was in daycare and people thought she was mentally impaired cause she was still in diapers at her age, but treated her like a baby anyway.
Eventually she was so conditioned to being into diapers, that she'd even wet her pants without them.
Anyone have a clue where I can find this story again?