Your Grace, Please Just Forget About This Wicked Wife!

"You'll just have to hold out until the sunrise again," he murmurs, looking at me with such adoring eyes... but wasn't I supposed to be the wicked wife he hates?!
Much to her surprise, our hero woke up one day as Ilse, the meddling and evil wife from a novel she once read. In the story, Ilse tries to come between the protagonist Gilbert and his beloved, only to end up trapped in a brothel with nothing to her name. Now, hoping to change the original plot, this new Ilse decides to get herself an amicable divorce from Gilbert. After all, if she can just avoid the tragic ending that's coming for her, life in this world might be kind of fun! Her plans come skidding to a stop, though, when Gilbert strides into her bedroom late that night. Poor Ilse is soon in over her head, suffering one indignity after the next at the (talented) hands of this coldly sadistic duke, and she just might be falling head over heels in the process... Come let this luxuriously dramatic fantasy romcom sweep you off your feet!

Source: MangaPlaza