I've readed the first four pages so far and i'm impressed... you've managed to characterize Monica pretty well. She's a lot like Lisa in some aspects, but with a streak of very sad resignation in her... growing up in the simpsons family alongside a tomboy like Maggie can't be easy at all... your fic really gets this message forward. Can't help but feel for the poor girl and the situation is described well and feels very realistic.

Looking forward to read the rest soon of course, i'll edit my post with final thoughts when i do