Bs4u's activites

I can’t remember the guy who was next to the crown prince who said to be careful. Who is he

She transmigrated into the body of Ancia, the current wife of the monstrous crown prince, Blake, in ...

All I remember is a girl was adopted by duke and there was I think 2 brothers and I don’t remember much but she has to try on a necklace and it had to accept her as a master. (Some fire dude). I can’t remember it

I read this a while ago and it was a girl who had left her husband’s house and went back home. She had a dad, brothers and a younger sick sister. She helped heal her. All I remember is that she had a lab in basement and she was treated very poorly by her family.

In the comments I read spoilers that her “dad” wasn’t her real dad and they were past lovers?? Not sure on details. Please help

(=・ω・=)

Wait why was he banned from the palace for three years again?.

Is there another manhwa that is almost just like it??