I have a similar story, if I may share it:
Background: My parents divorced when I was 4 years old. We never had contact with his side of the family until I was 14. At that time my paternal grandparents told my maternal grandmother and mom that they would like to meet us (4 siblings living).
True Story: One Saturday, we all went for a drive; Mom, Grandmother, my 3 siblings and me. They did not tell us where we were going, but they dressed us up as one would for a special visit back then. At one point, I said, "I know where we are going. Turn right here... later and then turn left there and it's the brown house on the corner. There's an old bald guy in the back with a tshirt and striped bell-bottom pants in the back yard and a real fat lady on the sofa inside."
My grandmother, a pentecostal holy-roller minister, turned around to look at me like she had seen either God or the Devil and screamed, "How do you know that?!"
I told her I had dreamed about it the night before. Every detail was exactly how I described it. My grandfather was bald; my grandmother was buried years later in a piano case, because she could not fit in a coffin; their house in Dayton, Ohio was exactly as I described it... including the clothing Pop was wearing!
From that day forward, my grandmother was skittish around me. She believed in visions from God, but could not accept it when coming from her grandson.