my guess? you think she's going to betray you, only dreams don't predict the future, so it's projection. which means you're doing something or judging yourself in such a way that you think that your sister would betray you if she knew what you were thinking and doing.
be Afraid be very Afraiddddddd
you need to be nice to her, and apologize for whatever you feel guilty for doing.
no i don't think you should worried about it sometimes dreams don't mean anythin..
You should probably kill her before she gets you.
I had the same dream
Watch your back!
It's telling you to sleep with ONE EYE OPEN!
It means your sister is going to shoot you at the back of your head with a gun.
it often means your sister is angey with you about someing in the pass.