Title of a manhwa

I'm searching for a complete manhwa. I don't remember clearly, but the Fl is smart. Helped her brother to overthrow the rightful successor of a kingdom but failed. The Ml cut her legs and maybe her arms as punishment. She used a formula with her blood to go back in time and use ml to extract her revenge against her family because they just used her and threw her away. Her mother is the mistress of the King, and her little brother is his offspring. The ml et fl got together /married and worked to destroy the King and his family. I lost the title and don't find it anymore. It's has more than 100 chapters and it's more political schemes than romance. She don't feel anything, just focus on her revenge. Ml had a really hard time to make her open her heart.