Kim will say it outright later, but when the seamstresses are thankful to receive larger piles of fabric, it shows the reader that employees are paid by the piece, not by the hour. The fact that Paula is handing out work personally indicates that she has a great deal of power to make or break her employees' careers. Similarly, Aunt Paula's insistence that speaking too long with Ma will make her look bad suggests that she's not necessarily a friend; rather, she has little interest in truly helping her sister or niece.