If I was the Empress the ugly bitch would suddenly "commit suicide" with a letter confessing everything... since she doesn't know when the ML will wakeup why waste this gold opportunity making a proper investigation?
Baroness or whatever isn't like any other aristocrat will care about her.
Not like that, Pat, not like that. Throwing her into the dungeon is fine, but after that she must "write a confession" and then "commit suicide out of guilt." Got it? Do it like I've said and this manhwa can end by chapter 40.