i dont understand anything from this, please someone explain

umm i am not sure but from what i understood i think she was the creator of an otome game and ended up gettiing reincarnated as one of the characters and decide to change the plot and shit whicle working with the prince but then out of nowhere she married the heroine's brother and i dont understnad the ending but i think she became a villainess like a vvery bad one i guess lol and i believe the one telling her to stop was the prince. I am sorry i didnt understand much either
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