I spend as much time with my kids as any mom who stays home. I only work during the hours they're at school but there is always the sense of trying to catch up with all their stuff and not only organize my work life but also their school lives.
Don't tell your kids you had an easy birth or they won't respect you. For years I used to wake up my daughter and say 'Melissa you ripped me to shreds. Now go back to sleep.'.