Houses in dreams symbolize the self. So this dream shows us that Gwynneth's personality is like a beautiful Victorian beach house: she's an old soul, has some deeply rooted morals and belief systems that some may find "old fashioned," yet she's also light-hearted and breezy, hence the beach. She'll dream her beach house starts moving down the river whenever she's feeling a little emotionally overwhelmed, as water in dreams reflects our emotional state. These dreams indicate that, when faced with an emotionally overwhelming situation, she's pretty good at not letting herself get "carried away," but instead has the ability to "go with the flow."