on the night Voldemort attacked Charles potter was wrongly declared the boy who lived by Dumb-as-a-door while Jessica potter was the real girl who lived. she was declared a squib and was sent to live with lily's muggle relatives, where she was often beaten. at the age of 5 she was raped by Vernon and left at the gate of wools orphanage.
the matron took her in and raised her as her own daughter, took it as her duty to care for her. when the matron found out that Jessica was pregnant because of rape she asked Jessica if she wanted the baby or not, Jessica was very mature for her age, she kept the baby and gave birth to beautiful girl at the age of 6 and named her Luna Jade Black. Jessica changed her name from Jessica potter to Jade Dorea Black.
Jade was gifted in singing she sang at clubs to earn money and helped Ms sun in bringing some brightness to the orphanage. when Luna did accidental magic at the age of three Jade bought a house, as she had become a famous singer, and shifted in it with Luna to practice her magic and started teaching meditation to Luna so that she can control her magic. Most of the Jade would be at work but she always sang a lullaby to Luna at night. At the age of 11 her Hogwart's letter came but with it came her godfather.
