Auersperg cannot force her to marry him.
She is of the same tempered steel as her brother, the great Monsieur Philip.

Were she a man as he is, she would dare as much as he does, and being a woman she will dare in a woman's way none the less." "And the others, Kratzek and Pappenheim, and von Arnheim if he should come, they are young and brave and true! Might she not, as the only way of escape from the high-handed baron, marry one of them ?" For the fourth time Suzanne smiled.

Never before had she permitted herself that luxury so many times in a month, but there was an odd glint in this latest smile of hers, which gave to her face a rare look of softness.
"Nor will she marry any of them," she said, "although they are brave and honest and true and love her.

Mademoiselle Julie has her own reasons which she does not tell to me, but I know.

She will not marry Prince Karl of Auersperg.