You set your mind that THIS was Mistress Fire, and so you started acting the way you thought she would expect. So you dropped to your knees in front of Gisele, and asked "Please, Gisele, will you give me the key to my chastity belt?" Gisele looked at you like you were speaking another language, then burst out laughing. "What??"
If she was Mistress Fire, then she did a VERY good surprised face. But, you had no choice but to press on. "Please, will you give me the key to my chastity belt?" More laughing. "T, what the fuck are you talking about?"