Batgirl watched the reactions of both Doug and Spoiler. This was probably a fantastically bad idea, since there were secret identities to keep and such. She supposed she should have given this matter more thought when she'd first hit upon the idea to train both Spoiler and Doug at the same time -- to kill two birds with one stone, as the bizarre saying went.
Spoiler was standing still without saying a word for the longest stretch of time that Batgirl had known her. "It's ... okay. Self-defense. Have learned from me. Used to me. Learn from ... each other. With each other." She looked at her two pupils. "Understand?"