Wait the blonde one didn't die or anything, they both divorced him and they even worked in the palace afterwards. One of them, if I remember correctly, became one of the heads of the maids (the dark hair one) and the other one was in charge of basically doing the same things she did before when being the emperor's wife, they created a new title and all for her just because of this new job (the blond one). I don't know if I might have remembered something wrong or expressed myself like shit but well, feel free to let me know if otherwise.~~
Well I read the novel and in there they indeed arrested her family but that was not her case, in fact she was the one who told everyone all of their deeds in a party they were having and so the emperor chose to believe her. I just said that earlier because english isn't my first language so I wouldn't know if I expressed myself correctly, that's why jsjsjjs.
Rebecca (the brown hair one) dies from childbirth and gives birth to a daughter who becomes empress. The blonde one is a traitor and is executed or imprisoned. The last on the black hair wife get divorced. Paulina gets pregnant and has a son, since the ML said whoever gives birth to a boy gets to be empress, Paulina becomes empress.