Sandra adoptive parents are ( Quinn Aguilera and Eric Aguilera) they're the pure fire(🔥).

but they are not the only one who possesses fire power control, they're many fire power,here are type of fire power (blue flame, yellow flame, purple flame , green flame, orange flame, White flame and the last but not the least,red(blood flame).but the Red flame is the most rare of fire ever, because it possesses black magic and blood of a vampire.so when she was 19 , she started having different series of dreams like seeing herself in blood flame, wearing black clothes ( like Elsa in frozen dress but all black) she was terrify by the scenes of her being a blood flame because at that century kill the blood flame power because they are a threat to fire kingdom ( gems of fire stone).
At some point, gems of fire stone were in heaven heart Mon high (fairy land) living happily together with the fairies. But unfortunately for them, a war broke out, this is where the story of Sandra Christina Aguilera began . She is the daughter season of Victoria Santiago in season 3 of the billionaire daughter.

Writer Note: Sandra Christina Aguilera is the daughter of Victoria Santiago, because of the war between fairies and werewolves , Sandra Christina Aguilera was lost in the fire stone kingdom, because of the destiny of Sandra Christina Wilson, because her father and the husband to Victoria Santiago ( Eric Wilson).