One idea might be to send your prediction in the mail, and after it is in the mail, have them think of an animal or object, etc. Then when they get the mail, it would be right. You would probably have to use one of those Elephants in Denmark type tricks tho. just a thought
My only contact is through mail. so this wouldn't work unless i put the prediction at the bottom of the page and had her think of an animal or whatever towards the top of the letter.