The Headmistress's daughter [James Sirius Potter] (On Hold)

A few years after the Second Wizarding War, the Hogwarts castle was rebuilt and Minerva McGonagall was appointed Headmistress. Lacking a few companions, Minerva was left a lonely old woman. A lonely old woman who, instead of adopting multiple cats like any normal old woman would do, she adopted a little baby girl, a b...