Write a scene involving a messy house. Have fun with it. Try your hand at humor. What does your character do when unexpected guests pull into the driveway and dirty dishes are piled in the sink and the house is cluttered with other stuff. Is the driveway long enough to give her time to do anything? If not how does she handle it?
Or have your character hunting for something they need within the mountains of mess. Like car keys for example. Let the house become a character as the two battle it out for possession of the car keys or whatever article you have your character searching for.