Ms Stevenson?

I'm sorry to ask, but I was hoping for some help. I've been trying to find a story that was serialized, that I was greatly enjoying, but seems to have vanished! I'm hoping someone can point me in the right direction.

I can't quite remember the title, but it contained "Ms Stevenson", and the story was about a college professor and his student, and a sexy woman who was giving him a potion to change him - it was a wonderful re-telling of the Jekyll and Hyde story and many of the characters were named appropriately.

Any help would be appreciated!

Love circe x