The Other Half (Harry Potter)

What if Remus Lupin had a daughter before the Battle at Hogwarts, what if Remus had waited to tell his daughter she was a witch until she was 13, what if she joined Hogwarts during 3rd year? Avalon Lupin was just an average girl, in some sense. She was homeschooled by her father, didn't have a mother, no siblings, and she always felt like a half of her was missing. But when she finds out she is a witch and there's a whole other world out there, she finally knows what her life was lacking.