Mothers of Multiples - What Are You Worth?

According to this news story, a fulltime stay-at-home mother would earn $134,121 a year if paid for all her work. Here's an interesting fact from the story - "Employed mothers reported spending on average 44 hours a week at their outside job and 49.8 hours at their home job, while the stay-at-home mother worked 91.6 hours a week, it showed." So what are mothers of multiples worth? Two, three, four or more times that because of all the kids at the same age? I certainly think so. Want to calculate your worth? Go here.