The Last Straw

After putting her children to bed, a mother changed into old slacks and a worn out blouse and proceeded to wash her hair. As she heard the children getting more and more rambunctious, her tolerance grew thin. At last she put a towel around her head and stormed into their room, putting them back to bed with severe warnings. While leaving the room, she overheard her three-year-old say with a shaky voice, "Who was 'that'?"