It was a villainess story. She was reincarnated with white hair and always coughing up blood. She martied the magician guy and he’s brother is the male lead who’s a tyant. The plot twists was that she did not reincarnate but rather was a sister of the villainess and was swapped. HUHU I FORGOT THE NAME PLS ANYONE
I think it could be this one
https://www.mangago.me/read-manga/when_the_villainess_loves/
The hell I miss them fighting together but that would be a bummer cuz what if they get seriously injured. Or mybe this will be an eye opener for pluton? to see them collab in fighting? ANYWAYSY THAT GUY IS A DUMDUM