Can someone quickly explain this Because I totally forgot what it was about and now I have...

So basically our Mc was married to the second prince however he divorced her since he found someone who he “truly loves” and our mc gets accused as a villainess by the second prince mistress so the mc father the duke sends her to his fief instead and tells her to manage it and the mc uses her modern knowledge to help the fief be better and the blonde hair guy is ml also the first prince and the villian of the story seems to be the second prince mistress

Okay thank you very much