She means that whenever they find out the truth they will turn against what they thought was right and become their allies. I would hope she became right. I don't actually know what this play is.
Explanation:
Among Beethoven's piano sonatas, one would consider the Pathétique, Moonlight, Waldstein and Appassionata to be the most famous.
Answer:
A lamp with the sun could be used as one
Explanation: