“Consider one study that estimates a mom simultaneously and often single-handedly performs as many as seventeen occupations in the course of raising a child, from child-rearing, cooking, cleaning, chauffeuring, and financial planning to resolving family emotional problems (not to mention often doing part-time paid work in addition to it all). That particular study estimated a mother’s worth at $508,700 a year, according to Ann Crittenden’s The Price of Motherhood.”