chapter 1- Polaris black

So basically, I had this idea (crazy right) what if Sirius and Regulus had an older sister? One that was legally already an adult by the time Sirius went to Hogwarts, she knows how bad their parents are and will eventually take them away to live with her, things will change, hopefully less trauma for the two brothers, and some cute sibling moments! cross-posted on ao3 & quotev