Akaikensei

Not sure if the story I'm after needs to be on this site or what, but somewhere late-ish last year I stumbled across a story (and shortly thereafter lost it) where a mother tricks her daughter into agreeing diapers as part of a punishment for something she did while they go on vacation for a bit. As the vacation goes on the mom uses hypnosis disguised as white noise when her daughter sleeps, slowly regressing her further and further until I recall in the last chapter, on their way home, the daughter completely gives into the programming and is fully regressed to an infantile mentality again... sorry if it's not helpful. I know I stumbled across the story a couple times more (and again lost it) after the first time but it seems no matter the keywords I try, I just cant find it again.