they say the your dreams come from things that you have seen, done heard read etc and makes a story out of those memorieswhen you sleep, your brain sorts out the things in your day and sees if they're important enough to store away as memories... did you both do an activity together or something?and yeah, ummms, like she has had to have seen your house to have dreamed about it, unless the house she dreamed of isn't actually the same, you should ask her!