Maybe you're right there.
She's just always been attracted to him because of his powers personality, he's fun to be around, danger tends to follow him and she likes the dangerous life,she is a thief (or atleast used to be). She doesn't like plain old, boring Peter Parker because he is just Spider man without a mask in her eyes.
This was the reason why Peter broke up with Felicia in the first place. And she was furious when he ended their relationship. But it would be interesting to see the Black Cat in a relationship with either Daredevil or Hawkeye. And on the extreme, Felicia could have a romantic relationship with Mystique!!!