It's possible you're thinking of a different character from the book, or perhaps you're remembering a character from a different work of literature.
Could you provide any additional information or context about Madame Haupt? For example:
* What role did she play in the story?
* What was her relationship to the main characters?
* Did she have any specific characteristics?
With more details, I might be able to help you identify the character you're thinking of.