u must not be very smart. Wifes battered syndrome is a psychological disorder. It happens when a man beats them and plays with their minds to make them think he will kill them if they don’t do certain things.
No she does not have the right to kill her sister. There is no proof supporting she ever killed anyone. She did kidnap which makes her an accomplice of the crime that did happen. You have to remember she was psychologically ill, you would look like her too if u had ur mind messed around with.
You are ignorant for your comments and need to learn a few things before posting stuff you don’t know about.