An Yaoluo simply thought his mother was sick, but An Yan knew her mother wasn't just sick; she had been poisoned.
Grandfather had said the poison was very cunning, able to endlessly replicate a specific factor in the blood, causing wounds to heal rapidly.
But the consequence was that it would make the blood viscous, leading to blocked blood vessels and eventually causing death.
All these years, Grandfather had tried countless methods to completely clear that poison from An Yan's system.
She had also asked Grandfather who had poisoned her mother, but Grandfather just shook his head.
"Your mother won't tell! I think the person must be formidable; she knew that even if she told us, we couldn't help, so she chose to bear it herself. She wanted to let the matter rest!"
At that time, An Yan couldn't understand why one should simply bear it.
If someone had dared to poison her mother, An Yan would definitely poison them back.