I'm looking for a story about a teen girl who's into ABDL, and she starts using hypnotic triggers to help her have accidents. She ropes her older into helping her get baby supplies, and the sister is less than enthusiastic about it. The story ends with the reveal that the older sister has given her more triggers than she expected. I think the story was called "The Dangers of Hypnotic Suggestions by Older Sisters" or something like that.