In the Richard Donner Superman movies, Eve Teschmacher is the Harley Quinn to Lex Luthor's Joker, and their relationship is similarly toxic.
This is best illustrated in a scene that was cut from the final film in which Gene Hackman's criminal mastermind attempts to feed his lovely assistant to his 'babies' - an off-screen menagerie of wild beasts - as punishment for helping Superman.
Fortunately for Ms Teschmacher, Supes swoops in and saves her before she can become baby food, having just rescued her mother, who sends her regards.
It's a fun sequence which adds to Lex's supervillain cred. Lowering somebody into a pit full of wild beasts is a trope straight out of the comic book bad guys handbook.
Apparently, Donner did away with the scene because he deemed it too silly. It's a good job the powers that be didn't take this approach when editing Superman III and IV because there'd be no footage left.