Husband's question: You have never expressed your inner feelings to your wife before, or stopped it. It is because of you that your wife thinks that you don't take this seriously at all, which leads to such a thing happening today! No matter how good the relationship is, some principled issues are insurmountable!
Finally: I suggest that you and your wife sit down and talk about their worries, let nature take its course and see if there is really something wrong with each other's feelings.
I wish you happiness