This is a great story, and was actually written by a mother who I've had extensive conversations with. If anyone wants to follow up on it that'd be great. A key element here is she was very ashamed she felt this way, but this shame drove suppression which drove greater horniness which drover greater suppression...

https://archive.md/04KLh
https://archive.md/wL2uY
http://archive.is/wL2uY