Things are starting to move fast, I didn't expect it.
I saw the note about how long the scenario description is so I decided to go back and read the whole thing xd
I am not sure about this because the only one in the wrong is the father to be honest.
The sister was just kind to her sister and tbh she just existed and live her life while FL hated her, this is the fathers fault because she got a new mistress.
The prince was just really defending her sister...