Two months ago, Anon was sent to Ponyville on Celestia's behest. Now, after not hearing from him, Celestia goes to investigate (a bit belated, sure, but without that plot point the whole story falls apart so whatever). She doesn't like what she finds. Neither will you.
Not a clopfic despite the sex tag, but there is a ton of filthy language and imagery here written by a filthier mind. You've been warned.