Curley's wife also wants to be loved by someone. Curly doesn't treat her right at all. He's always yelling at her and getting upset for bad reasons. Curley's wife knows that Curley does not really love her. This is one of the other reasons why it is that she flirts with other.
Curley's wife has a lot of names, but we can't repeat any of them in mixed company. Let's just call her trouble: she's a good-looking woman who knows it, wearing makeup, form-fitting dresses, and ostrich-feathered high heels. (Which—let's just say it—maybe a tad impractical for a ranch?).