Teen Wolf x Harry Potter

What if Lily Potter had not one but two kids, and they were four years apart? What if she helped kill Voldemort with Harry? What if Lily and James Potter were still alive? What if Rose didn't grow up with her parents and Harry but someone else? What if she's a witch but also something else? What if they watched the life of Rose Potter? What if Rose is now known as Rose McCall? *Harry Potter rightfully belongs to J.K Rowling and Teen Wolf rightfully belongs to Jeff David. I only own Rose and the plot of the book*