Tonks nodded, a little dumbfounded at all of the information she had just received. The fact that Willow had taught herself the majority of what she knew, and could thus perform such complex magic so effortlessly, blew her mind.
Instead of pressing the matter further, however, Tonks simply gave an easygoing smile. "Very cool," she repeated. "It's good to meet you, by the way. I think we bypassed etiquette somewhere between introductions and my bombarding you with questions. Sorry about that, by the way!"
Unable to resist, she grinned apologetically before adding: "That said, a Hellmouth? Doesn't sound like the place to be on a Saturday night, if the name fits."