It's funny - I've always liked Arthur more than Molly, but you have given me new insight and a lot of sympathy for her in this story, Mystery Author. She and her background are very real - and I seeing Fabian and Gideon as they cared for her after the break with her parents made her loss of them hit home, and made me see, for the first time that direct line to Fred and George.
The developing relationship between Molly and Arthur really fits with what know of them in canon. They are simply perfect for each other, and that shines through in this beautifully. Well done!