The woman's name was Helena and she was only carrying a suitcase. In it, she carried everything that was her possession. Andrew immediately deduced that her former boss was not treating her properly.
This conclusion was not based on the fact that the lady had any physical injury or damage, what led Andrew to that conclusion was her baggage. Courtesans and slaves are not so different, the only difference was in a certain way the treatment.
While slaves had a soul contract that allowed their masters to dominate their entire existence, courtesans had certain privileges. Among those privileges was the ability to earn money.