If you have a child then sometimes you will see in there status bar "hiding". Well if two kids are hiding, and one adult (only adults) is picking up a rare(not common) item, then a message will pop up that says "A neighbor has invited you to a house warming, you decide to go, as a gift you give 20 coins". Then you are automatically put in a different house that is fully furnished and all the rooms are made. You can claim this house if you dont go to your own house untill the "owners" of the new house die. The owners do not have children so they do not start a new generation. You will have to switch back to get your furniture from the old house, but if you have other people of your virtual family in the new house, then buy a random event, you will automatically go to the new house. I tried this, and I'm still living in the new house for twelve generations.