Oooo, yay Jack's finally in magic land. ;) I always love the little Wizarding details you describe. Like firewhisky--lots of people talk about firewhisky (including me, probably!) and don't treat it any differently than regular whisky, but you always add the little touches like the smoke and the flame-freezing charm (hehe) and I just adore that.

Jack asking if Ianto knew that sex spell, too, made me giggle.

I'm having so much fun with this story!