Maria Bertram's "comfort that pride and self revenge could give" was to marry a man three times richer than the man who deserted her, and find "consolation in fortune and consequence, bustle and the world, for a wounded spirit".

Jane's reaction was to sacrfice herself to the governess trade -- to find consolation in teaching children in the schoolroom?

In fact, I think Frank's letter did Jane less than justice when he said that Jane spoke her "resentment" in a form of words perfectly intelligible to him. Jane's words about not letting an unfortunate acquaintance be an inconvenient, an oppression for ever could actually be taken as Jane's reassurance (rather than resentment) to Frank that if he regretted their engagemetn, she would not hold him to it.