From Wikipedia: "In human females, the nesting instinct often occurs around the fifth month of pregnancy, but can occur as late as the eighth, or not at all. It may be strongest just before the onset of labor.
It is commonly characterized by a strong urge to clean and organize one's home, and is one reason why couples who are expecting a baby often reorganize, arrange, and clean the house and surroundings. This behavior is colloquially known as "straightening out", "clearing the road", or "clearing the coast"."
My least favorite part about our house still remains... ugly flowered wallpaper! Not to my surprise, there was an additional ugly flowered wallpaper under the first layer. So for the last few days in the afternoon I have been strengthening my arms by scraping the walls in the stairwell.
The family members that know me well will not be surprised by the mess left on the stairs. Yes Mom, I did clean it up!