Sierra has been with Riley and Richard Cyriis for a long time now, and she fits right in with the filthy family. But it all started somewhere, and this is it. She barely had to be trained and willingly opened up all of her holes to accept every drop of piss given to her since, even accepting bottles of old piss being dumped all over her. She's the only person on earth who loves being a toilet for her step-Daddy as much as Riley.