I have to wonder... how the hell did she put that tail? if I'm not wrong, that tail has to go in the a****le, right??? Did... Did she... Did she put it there?????? DID SHE??? My Sherly??? DID SHE????!!!

It really was a butt plug tail. If you re-watch the scene were she recieves the maid outfit you'll see there is only one way the tail could be attached, or inserted I should say. Pixiv have been busy with the maid Sherlock art, I would have liked some SherlockxClaris yuri pseudo twincest art too though.