Any song is open to interpretation of course, but after listening to the lyrics a few times now, I think it's about a young couple that used to go to this motel to get away from their parents and have alone time. The whispered secret is an unplanned pregnancy, then a shotgun wedding, and then come the kids and the bills, the bills and the kids. Some have said that she is dead- she could also still be alive but possibly her mind isn't there anymore. The condition of the motel might be a reflection of her physical state- Alzheimer's disease slowly strips the mind of all memories, until it's "filled with empty". When I listen now I think of a movie called "The Notebook", one of my favorites.