I'm interested in all the points about Jane Eyre! There's a famous piece of early feminist literary criticism by Gilbert and Gubar, entitled 'Plain Jane's Progress', in which Jane and Bertha are read as elements of the Freudian 'iceberg' theory: Jane being the superego and intent on living by the laws set down by society and God; Bertha being the untamed libido, or 'id'. They get very symbolic about all this, viewing Bertha's tearing of Jane's wedding veil as a symbolic loss of virginity, and in acting out the desires Jane would really like to act out herself.
Which is all very well, until we see from the text that Jane herself is an impassioned soul, and that this passion gets her into trouble many times in childhood. After the abortive wedding when Rochester turns the full power of his sexuality and passion on her to make her stay Jane wavers: she wants to accept being him on the terms he suggests, despite his attempts to deceive her: she's by no means turned off him.
It's Rochester himself who has pretty inhibited attitudes to female sexuality, despite his travelling around the continent bedding every mistress he could get. Celine Varens was too sexy, and too promiscuous, which disgusts him even though so was he. He later abhors the time he spent with his mistresses, which is the one thing sealing Jane's resolve not to follow in their footsteps and end up being an object of disgust to him. Rochester seems to be employing a peculiar form of cognitive dissonance: he wants, and is repeatedly attracted to, passionate, sexual women with a free-spirited, physically voracious appetite for sex, and by the same token he's disgusted by them and having had his satisfaction, they leave him cold. Jane's suspicions are right: when she meets him near the end of the novel he tells her 'I would have sullied my innocent flower' (ugh, UGH!) had events transpired the way he wanted them to at first, before the death of Bertha.
Du Maurier's Rebecca is pretty much a duplicate of this narrative, but here the husband is overtly disgusted by his wife's sexuality. I also love Wide Sargasso Sea and I love Jean Rhys, but Rhys is a very different type of author to Bronte, and the world she wrote in was one of unprecedented change for women.
I personally prefer Vilette, but Jane Eyre is an incredibly powerful novel, even the number of huge coincidences in the end challenged my suspension of disbelief.