
Not Marquess Chiade. Or the Queen consort.
It was the cowardice of the Emperor.
He knew that both the Empress and princess were innocent yet he still left them to rot in a tower dungeon where eventually they snapped.
The Queen and her brother hating the Empress was expected considering the Emperor did the Queen dirty.
Its pure pornhwa and recent chapters have changed the genre to NTR.
He is "preparing" her to sleep with other men while he did some "tasters" to test the waters and her response to his schemes (pretending to be massuse to give her a sexual massage without her knowing its him and ordering to answer the door basically half naked and get duped into letting a delivery guy grope and finger her) he has interpreted those "signs" as her ready to initiate her fully into NTR and watching her sleep with men, possibly even go to those gang bang orgies he use to attend. Hes a groomer and a freak.
Keep in mind the FL at this point is suppose to be his "wife".
The ML is a sociopath i think he takes pleasure in watching the FL be "ruined" and sink lower to his level of sexual depravity and become totally submissive to the point when strange men grope and assault her she doesnt resist.