What an incredibly fun romp, you two! I loved how eagerly Harry helped Snape in brewing the potion for him, and using a demented Narcissa was a really fun idea! Getting Hermione's parents from Australia was a great way to bring those two "closer" together (in more than one sense of the word...hee).
Oh, and the smex. *luved the smex...it was sizzling* Their banter hit just the right tone for me.