Conversation so far:
when was all about eve developed?
The story of All About Eve originated in an anecdote related to Mary Orr by actress Elisabeth Bergner.
what was the anecdote?
Bergner allowed a young fan, Martina Lawrence, to become part of her household and employed her as an assistant, but later regretted her generosity.

Question: why did she regret the generosity?
Self-contained rewrite: Why did Elisabeth Bergner regret allowing fan Martina Lawrence to become part of her household and employed as an assistant?