The little boss and her aunt had no blood relation, of course, one could also say they did.
It was said that in that era, the popular 'Sisters' Blood Pact' would result in sisters who formed the pact sharing each other's bloodlines under the influence of a witchcraft ceremony, each possessing the other's blood.
The three sisters' bloodlines were mixed.
This covenant did not exert strong binding power over the parties involved, it served more as a method for complementing each other's bloodlines with superior genetic traits.
Thus, the three sisters came to possess the best attributes of one another; you have my pale, alabaster complexion, I have your double eyelids and thick hair, she has our wide hips.
As for side effects, well, if someone cursed one of them through their blood, all three would be affected.
This kind of lethal injury made even the witchcraft trend fade quickly abroad where it had begun—because one death led to many.
——because when one died, many fell.