siblings in everything but blood

Sasha Lupin-Black has gone through a lot of troubles in her life but the but the main one hit hard when both of her parents died on Halloween the same as a James and Lily Potter had her and her brother were 15 at the time the twins didn't get along very much they used to be extremely close when they are kids they started drifting apart when she got into Slytherin and he got it got into Gryffindor now join her as she makes new friends new family most of all new siblings when she goes to her godparents house the Wayans with them will her being separated from her brother be a good thing or bad thing and how will it affect her when she is sent back to Hogwarts during the school year and left without her brand new family with her going to the Wayans and him going to the Weasleys what will happen ( I might just make this a bunch of headcanons about this idea at first then going to a real story so I can get a main plot line set up cuz I have a lot of ideas many ways that this can go but they're all in completely different ways that can cause completely different outcomes)