Why did I survive?

Muzan had decided to let Nezuko slowly bleed out as morning was slowly approaching and he didn't want to waste any energy on this small girl he was sure was going to die in a few hours, not knowing her older brother would soon come to find his massacred family and almost dead younger sister.

Nezuko is greatly traumatized by her experience but feels its her responsibility to not show it as she harbors a great amount of guilt towards her deceased family, and feels she shouldn't be allowed to be given any form of comfort.

This is my first story so any type of constructive criticism is greatly appreciated. :)

Updates will be sparse as I'm in school and put that first.
(None of the art included is mine)