I understand. She's looking to profit from your hours of effort without shedding any sweat of her own, and you hate to see her get away with it. I suppose you could mention it, if your copycat's name comes up while you're chatting with a Firm X colleague. Word does get around in a small field. Just be warned that the word may not be any kinder to you.
Karla L. Miller writes an advice column on navigating the modern workplace. Each week she will answer one or two questions from readers. Miller has written for and edited tax publications for 16 years, most recently for the accounting firm KPMG's Washington National Tax office.