In this case, Queen Corliss from The Way to Dendara, who has been cursed. In this scene, Lucy is meeting her mother, the Queen, for the first time:
A hand reached out to pull the bed curtains aside and Lucy nearly screamed.
Instead of a still attractive but sickly woman of middle years (which was what Lucy had expected to see) there was nothing but an old crone, a small, wizened slip of a woman whose face was like that of a withered apple. And Lucy was glad for the darkness, glad it hid what it did, including her own horrified expression.
A little cackle escaped the woman’s cracked lips along with a speck of spittle. “Eh, I know what you’re thinking,” she said with a raspy voice and a gleam in her eyes, “You're hoping I am not your mother, eh?”