Special section: Back to School In “I Don’t Know How She Does It,” Parker trades her sexy, single status for working mom and steps into a role shared by 16 million American women|I promised her.” And I felt so powerful, the need to do your work and to honor the great love and responsibility you feel for your kids|”Everybody is struggling to find their own ways to make this work|Pictures: “I Don’t Know How She Does It” premiere On “The Early Show,” Allison Pearson, author of “I Don’t Know How She Does It,” said she got the idea for the book from an experience when she was going on a business trip|Christina Hendricks outshines fashionistas on New York red carpet Working moms balancing job and family have been Hollywood heroines for decades, though the stories have often focused on the struggle of making it work – and most often it doesn’t|Millions of American moms balance work and family every day|She explained, “I was away and my husband, I handed him a list of things to do in my absence}