[dead goon]

Start with her. the best thing to do when learning a new language is to surround yourself in it from the get-go. She will be able to teach you a hell of a lot more than books can in the long run, and a lot quicker. Start off with learning basic words and a base understanding of how the language works. Get her to say words in Dutch in normal conversation to you, make sort of like a game out of it, and you'll slowly pick up on things and develop an understanding of sentences. Also make sure she's OK with you asking a million questions.

Other than that, check out ebay or amazon for some books. Dutch isn't one of the main languages in the world, so I can imagine learning content is a little harder to come back than say German or Spanish.