It's my latest story.
https://www.lushstories.com/stories/supernatural/-secular-supplicants-of-the-tentacle.aspx
Active Ink Slinger
"The Punished Nonpartisan" <- Extreme BDSM and humiliation story. Heavy on plot. Served on a plate of political drama with a side of domestic terror. Currently Free download.
Jocelyn the Wicked <- futanari, fantasy fan fic, and some tentacles that escaped the laboratory