I smile through my tears, lean over and whisper "I'll put you in my briefcase" into my son's ear. It's the night before my first day back at work and I am extremely anxious and emotional. We are sitting on the floor in our family room and I am fighting back tears. Alex is playing with cars and blocks but keeps glancing up at me as if to check that I'm ok. I smile each time not wanting him to see how emotional...