She's gotten away with too much.

A shovel to the throat. Clean like butter.
Glass shard to the gut. Fallen matriarch.
A scythe to the heart. Premeditated?
Scissors to the ear. Missed opportunity.
Do you see what I'm getting at here?

She's a killer. A murderer. She's the monster here. She knows about it. She's a reaper, why do you think she picked a scythe?
This isn't even the full list. It's merely a taste.
I hope you're satisfied. I, however, hunger.