The Villainess Is A Marionette

Read manhwa The Villainess Is A Marionette / 악녀는 마리오네트
Cayena, the Imperial Princess, was known as the most beautiful woman in the Empire. She was a woman who knew nothing but evil and luxury.
However, she was destined for ruin: she would be used as a chess piece by her younger brother to secure his throne and killed by her crazy husband.
“I’ll make you the Emperor.”
“… Sister, are you referring to me?”
“In exchange, give me freedom.”
She had to change things before she became that Cayena.
Russian / Русский:
Принцесса Каена, прославившаяся своей красотой на всю Империю, не ведает ничего, кроме алчности и злобы. Долгое время она пыталась избавиться от своего младшего брата-тирана, но встретила смерть от руки своего мужа.
— Я помогу тебе стать Императором.
— Сестра… Вы обо мне?..
— Но в обмен… ты подаришь мне свободу.
До того, как «я» стану принцессой Каеной.