"Evil" implies doing wrong for its own sake, not because of recognizable human motivations.
No matter how sick and twisted a person gets, s/he doesn't become a moral cartoon who does evil just because.
I'm not going to go into further detail here about the evil bitch - but yes, her actions have gone way beyond "recognizable human motivations" such as (for example) greed. Sorry if I was unclear about that. She is proof that a person living today can be a conduit of "just because" evil, and you're lucky not to have (yet) encountered such a person close up.