As a mother you may still do a big share of the household organization, shopping, cooking and generally making sure that the "operation works." It is behind the scenes work that can be exhausting. It is often invisible, under appreciated and yet critically important. Of course you stay up at night with a child who has a fever or can't breathe. Of course you worry when your teen stops talking, comes in later than she promised, or brings homes friends that don't seem to treat her respectfully. And it makes a difference.