OK, but just for the record in service of possible other newcomers to the game:
Story progression is an option in the options menu that basically allows uncontrolled households to do things on their own without input from you as a player; such as getting married, having babies, move to new houses in the neighbourhood, age etc. This is to make the neighbourhood feel more alive. However, in this case, if you want to control multiple households you may want to have your other family stay the way it was when you last controlled them. Therefore, my personal advice is to turn this option off first.