The self-absorbed.

That was just a wordy introspection by someone marveling at her discovery of a new way to be inconsiderate to others.

She's a horrible excuse for a relative. Yea, I get the point that "nobody picks up the phone these days", but it was her own sister calling.

You forgot “and then wasn’t even bothered to listen to the voicemail”.

Why would you even want to talk to her, with that monumental level of disdain?

Cousin, not sister.