The witch probably thought Hermione was nothing more than a traitor. Most of those who fought with the Order in the final battle, even if they weren't official members themselves felt the same way. Rosmerta joined many of the other Hogsmeade shopkeepers to fight against the Dark Lord twenty years earlier. While Hermione didn't know all of the details of what happened to the witch when the war ended, she knew that it was only as a result of having some well-connected Death Eater friendships that she was able to return to her tavern. A cousin of Felix Travers, she had to prove that she would be loyal to the Dark Lord repeatedly over the years in order to stay in business. It hadn't been easy.