Final answer:
Serafina is working hard in the beginning of the book to save money and pay back Wynne.
Step-by-step explanation:
In the beginning of the book, Serafina is working so hard because she wants to save money and pay back Wynne. She has been living frugally for ten months and is determined to be free within two to three years.
She goes to work every morning and comes home late at night, living a dull existence.