Mrs. White is a strong woman, and the narrator even says she's smarter than her husband. We get the sense that she makes lots of decisions for the family and that her husband is happy with this reversal of traditional gender roles.
As mentioned in Mr. White's section, she might go a bit too far sometimes, to the point of forcing Mr. White to do things he thinks are wrong, like wishing Herbert back to life. Some readers see her as mean and dominating.
It's really impossible to find out which dialogue you're talking about. Anyway I know the dialogue between Suyuan revealed mother-daughter love, conflicts and so on.
Romanticism, which valued the individual, subjectivity, creativity, and nature, was a response to rationalism. Rationalism was based in logic and down to earth thinking. Rationalists thought the world should be approached with intellect, not emotions.
Hope this helps!
Opaque means it's not see through, not clear, or transparent