*points up* I echo what IGToW wrote. You have fleshed out the scene from the book well, adding the emphasis on the pride and prejudice of both characters (although Severus *sighs* gets the Gold Medal on the latter count).
For the art itself... Well, I confess to being a sucker for anyone who has the confidence and the raw talent to use traditional mediums, and you certainly have both in spades. Well done!