What are feminist perspectives on Jane Eyre?

There are many different feminist perspectives one could explore in relation to Jane Eyre. One of the more interesting perspectives, and at the same time one of the more paradoxical, concerns Jane's behavior toward Mr. Rochester. The two are deeply in love with each other, yet cannot be together so long as Rochester is still married to his criminally-insane wife. Rochester tries to get around this little difficulty by effectively offering to make Jane his concubine—essentially a mistress. Yet Jane instinctively rebels against such a notion. She desperately wants to be with Rochester, but not that desperately. So she firmly rejects his offer to live in sin, as it used to be called.
Jane's rejection could be construed in feminist terms, in that as a woman she's challenging the second-class status in society to which she'd be reduced if Mr. Rochester's sordid little arrangement ever came to fruition. It's bad enough that, as a woman in Regency England, she's already regarded as inferior. But agreeing to live in adultery with Rochester would lower her even further in the eyes of society.
Yet herein lies the paradox. Jane is asserting herself against the sexual desires of a man, but at the same time choosing to follow the dictates of social convention, with its very rigid notions of propriety. This raises an interesting question: is it a feminist act for a woman freely to choose to follow an established social system that keeps her in a state of subjection?