Just finished a new chapter for this story, but there seems to be a bug with the character limit. I'll post it here as soon as it gets fixed, but if you want to read it now it's here:
https://archiveofourown.org/works/23762353/chapters/81531940

==Disciplining the Knight of Treachery (Futanari, Yuri, Rape, Incest)==

Artoria Alter seeks revenge on a certain traitorous knight, and she borrows from Merlin the perfect tool for the job.