What’s the manhwa
What I remember
I remember a chapter where the FL made some sandwiches for her father then she faked being sick and called a doctor and told the doctor to check on her father first so the doctor when to her father who is a duke or something then her father said to the doctor to check on the FL first but the the doctor said that the FL asked the doctor to do him first so he agreed and they found out that her father had poison in his blood/ body that if he had to much of it it could kill him but the FL knew of it so she faked being some so they would find out.
The father had been being poisoned with something over years and when he has so much over years he has a heart attack or something I believe someone says in the manhwa
I believe this is one of the manhwas that the FL died or something and now she knows what going to happen in the future or something like that
I’m not 100% sure but I think the FL is not the biological daughter but I’m not sure don’t know if this helps
If it sounds familiar say and if you somehow know what character that would be nice