I can't remember the title of it, or the names of anyone, but I remember it taking place in some sort of spa place. It focused on this one woman who had just gotten this treatment or something where she lays in a thing of mud or something that hardens and she isn't supposed to move or it gets messed up. But this young, mischievousness girl comes and starts tickling her feet and she is insanely ticklish and tries not to move. I also remember that the girl pretends to be one of the people who works at the spa. Does anyone know what I am talking about?