She heard her master say "it's time to take her life" and her senior brother said "kill her after you use her". She could hear malicious intentions, including those closest to her, but the only one who could make her inaudible was the "mute" assassin who never spoke.
Intent: When forced to become a container of evil, only by breaking the cycle of evil through self-sacrifice and letting the perpetrators reap the consequences can the curse be ended and new life be restored.