The Lost Princess of Magic Family

Elias, a laborer, is owed 70,000 in wages, and Aurora goes to the Ignia family to collect it for him. That is how she ends up at odds with the third son of the house, Marcus, who throws her down from the second floor and makes Elias kneel and lick his shoes. She was born into that family, as Anna. At six she got into the family sanctuary and set off the Primordial Flame, which the Ignias forbid, to save her twin brother Marcus, and it nearly cost her her life. Her father decided she had no magic and was good for nothing, drained the blood out of her, and left her in the slums to die. Elias found her there, gave her his own blood, called her Aurora and raised her. Aurora does not know that Marcus is her twin. The lady of the Ignia house is her birth mother, who prays day and night for her lost daughter to come home, and who has Aurora's clothes torn open in front of the household and slaps her. The word the family uses for people born without magic is muggle. Marcus keeps Aurora as a spare blood bank for himself. She is bled until she passes out, and when she wakes the instruction her mother has given is that the blood be kept, because Marcus may want it at any time. Another time she is accused of stealing a book, and they pull her clothes off and search her in public. Then there is a contract for her eyes, 300,000, put to her as that or watching Elias die. Somewhere there is a test report saying which girl is the real daughter of the house. The mother burns it to protect the one who has been passing as her, and by then Marcus has already got the eye contract signed. Aurora's own magic wakes in her later on and she starts taking back what the family took.