I imagine it's not so much Clark she be interested in, but more of her attraction to Superman. Why wouldn't a bad girl like Catwoman find comfort in a guy who's like a god?
Also same chemistry worked well for Emma & Cyclops, but I don't expect butt hurt Batfans to understand. You can't deny that there maybe something interested underneath the surface.
"Batman fanboy?" LAWL, I HATE Batman & Superman, but even I know that Catwoman and Batman makes way more sense than Supes and Catwoman. It doesn't matter what Catwoman is attracted too, Superman doesn't date/like bad girls. Period. And Emma & Cyclops was a garbage pairing too.