Okay, so I sent the first 90 pages to my editor, and she said that the first 50 pages were perfect, but that the next 40 pages were enough story for the whole rest of the book.  She also said that page 90 was a good place to end the first book.  So I've decided to try and turn the second 40 pages into 250 pages, because my goal is to have about a 300 page book when it's finished.  The nice thing is that I had 2 pages that basically condensed a month's worth of days, and I can make things happen there.  Also, I'm adding more back story, explaining things better, and I've added another character.  I should be able to make it happen, but it will take some doing.  And I'm not going to just write filler, I'm going to make sure that what I add is quality, makes sense within the confines of the story, and is interesting to the reader.  I'm not going to cut corners or settle! <3