Mori 
Duchess in the Attic (Manga) Volume 3 [EPUB ebook] 

After a shrewd counterattack, Opal takes the duchy and all its assets from her ignorant husband, Hubert. Now it’s time to fix all the damage he did by neglecting his domain and kick her grand reformation plan into motion! Leaving Hubert and Stella behind in the capital, Opal moves to an estate in the ducal lands. There, she recruits the newly rehabilitated Omar to help with the next steps, and the duchy starts to thrive. However, Opal has a bad feeling when Hubert pays the estate a sudden visit—and her fears are quickly proven right when she realizes her husband has done the unthinkable…