FORMER- Welcome to the board my friend ! Nice to have you here. I am so sorry your sister is being treated like this from your parents. Some good advice earlier from some posters ; however if your sister gets to the point of being unable to take the mental and emotional abuse from her parents - perhaps YOU may be able to give her a place to stay so she might get a therapist or counselor to assist her. I'm sure her mom & dad won't allow it due to the blackout on Psychiatrists by the WT society. Just a thought in a worse case scenario. Better for her to be with a loving brother who accepts her unconditionally than with parents who may drive her over the edge , perhaps without return. Believe me, that HAS happened to people after exiting the Witnesses.
I'm glad you have your freedom my friend and look forward to hearing more from you. Please know and be aware you are among friends here who have been through injustices as well from the organization. I could write a book if I had the time or money ! LOL ! Anyway- great having you, please take care of yourself and sis ! Peace out, Mr. Flipper