Does anybody know this?

So, idk if mangago has this manhwa, but there was a girl who worked as a maid in a wealthy household, i remember that she proceeded to screw the whole family, and if i remember correctly she was there bc an old lady told her story and wanted revenge on her fam, and told her that if she succeeded she can have the inheritance or smth, by the end she ended up becoming a homewrecker,
I know i finished reading it, but I’m still pretty curious and I wanna read it again ;-;