You reincarnated as the daughter of a lowly count in a manhwa The Villainss is a marionette, you made a nice friendship with Cayena begins to notice something strange about Rezev, something like an obsession with his sister, Cayena

you was having tea time with Cayena and then Cayena went and you was left alone, until you saw Rezef enter, Rezef notices that you have the same beauty as his sister