How does the Queen disguise herself when she visits Snow White's cottage in the novel, Fairest of All: A Tale of the Wicked Queen?

The Hag is the disguise the Queen wears when she brings the poisoned apple to Snow White's cottage in the woods. Disguising her beauty from the world, the Queen's appearance morphs into an old, crotchety hag. Everything from her voice to her posture changes as she is transformed into the hag. After Snow White is cursed, the Queen realizes with horror that there is no antidote to her disguise. She will be forced to live as the ugly hag for as long as she lives.