At the end of this chapter, Jane reveals her spiritual state:

“My future husband was becoming to me my whole world; and more than the world: almost my hope of heaven. He stood between me and every thought of religion, as an eclipse intervenes between man and the broad sun. I could not, in those days, see God for His creature: of whom I had made an idol.” 

I know this feeling well. I have fallen into it several times. Even among two believers, committed to following Jesus, the tendency can be to spend so much focus on an earthly delight that it begins to shift more and more focus away from the Lord, and on to the other person. I would never have wanted to admit that, but sometimes you need to face hard truths in your life.
And it’s an honest bit of writing to include this as part of “Jane’s” character.