Missing context in the story? Where she came from and what she used to be? It's chapter ONE. Or is there some LN/WN everyone but me has read?
The thing you need to watch out for with the quiet ones who actually have power, is the day they snap. And realize how weak their bullies actually are. Let's see if she heads in that direction, and her husband comes home to a partially ruined house. From what I see of the Count, he dislikes the nobility and aristocratic customs. He married for convenience so people would stop hounding him with their daughters, but if he gets more than he bargained for, let's see how he'll take things if his wife is actually that powerful. Of course that would likely depend on where she reincarnated from.