ANSWER:

As long as your father is alive, you can only give her diplomatic advice and nothing more. 

Sheikh, does my elder sister have authority over me, her younger brother? Sometimes I explain to my sister that I am her brother so she must obey me, but she replies that she is my big sister and that I have no right to her. I am 24 years old and she is 29. I have two big brothers who let her do anything and my father does not act, so I try to act for her, but she pulls out this excuse.

Fiqh of the family | December 4, 2019 6:42 pm
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My inlaws have slandered me, done black magic to seprate us (caught red handed by their own son), wanted him to remarry and leave me pregnant and more. I cant forgive them and dont want contact. My husband cut ties with them and hates them after seeing my suffering and their double standards and unislamic values. I tried asking him and reminding him of his parents rights, what else can I do?
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My parents are getting old and my brother doesnt want to look after them so me being the only girl of the family, can i refuse to get married because of responsibility to take care of my parents?