A curse on her mother? A hard life? A fire in the mourning hall?
What a devious plot, killing three birds with one stone!
This smear is as vicious as it is precise. They don't just want to ruin her reputation; they also want to blame her, this "ill-omened person," for her mother's death and the burning of the mourning hall, leaving her with no place in the household!
Premise: Blood pearls as blades, shattered jade as the plan: her dowry is meant to secure peace across the realm