Send the kids away

For the "Tale of One Kitty, Four Titties, and One Lucky Bloke" by cloneserpents is a helluva kinky story. There should be somewhere on Ficwad a, how shall I write this...more precise (detailed ? horny ?) version
But this one is quite enlightening, on what happens when Hermione experiences belated side effects of the Polyjuice mishap in 2nd year, while Susan, Harry's girlfriend, happens to be quite the cat lover.
(And Harry happens to be a Voldie free enthusiast young man).