The outcast (marauders era)

Harry was told there was two black children but there was three, harry was told there were four marauders, the only thing that Harry was told that was correct by Sirius was that someone always paid for his mistakes.

Samantha black or known as Sammy, was the only black not named after a star or something in space. At birth she was already an outcast with bright red hair and big blue eyes. As the twin of Sirius black growing up was hard especially when everything Sirius did wrong Sammy would get the consequences. Find out if she survives