If she makes you feel jealous, she is an unicorn. I've only known one woman who could pull that off. (her secret' that guy is hitting on me). Several others tried to make me jealous, but only made me feel that I was her beta orbiter (which I was, but that was not what they were aiming for.
Finally, if she tries to make you jealous, she has a security problem, but she will usually make it seem a respect problem.