It's short, it's unpolished, and the MC is an absolutely conniving bitch. And, oh, my god, it was magnificent.
Susan is horrid and also compelling. A fun (yet sadly not that far from reality) caricature of your garden variety sociopathic creature.
From the first letter I was laughing at the convolutions and machinations, and all the suspected make-up to what could be inferred of recent past happenings.
Facts are such horrid things!
And facts do come out, because it is a happy little story all things said. Oddly cute romp.