[Request] Looking for a story

[cforclaude]

I remember reading a story years ago and I can't remember what it is called. I remember a few parts of the story.

The story sort of begins with a young woman eating at a restaurant and she then goes shopping and at the mall she left her purse behind and a crazy old lady takes the purse and then the old lady follows the woman to the toilet. The young lady is changing her diaper and the old lady breaks into the toilet kidnaps her erases her identity and turns her into her own daughter. She is enrolled into elementary school. I think there is mental and age regression. And during the story one of the young ladies friends attempts to rescue her. She is then chased by police in an attempt to escape.

If this isnt one of your stories, I really hope you might be able to tell me where else to find it.