Dont give up.....My Mom is 88, I got her up to speed last March and she has been a rock since, she doesnt understand why things are not happening (in the open) and its hard for me to keep telling her its coming. Praying for you to have strength to keep telling your sister this is all real. Have her watch the new movie Sound of Freedom, it can be watched streaming now. https://bit.ly/38lW3zD. This should help her understand what you are trying to tell her... Let this movie talk for you. God bless.🙏 ps tell her my story about my Mom being 88 and is an Anon for year now and how she has been telling all her freinds, some listen, some laugh at her, and some just cut her off and you know what she said? "Too bad for them, they are just ignorant"... That's my Mom (see where i get it?😉)