Remus Lupin has a daughter, who was the best friend of Harry Potter, whom she befriends on the way to Hogwarts. But, a short way into first year, Reese gets taken out of school, for several risks are too great. Although, she turns up again at the start of third year to join in on the fun. T for a British curse word or two...

Harry has a little sister, who turns out to be a bit more special than him, yet nobody knew that she existed except himself, Sirius, Lupin, and his parents. Watch their complicated story unfold. T for a few occasinal curse words, I'm gonna play it safe.