When I was a young single mother, there was a time when I was going through a trial with my 15 year old daughter. She was a very heavy sleeper. You could have a freight train go through her bedroom and she would not wake up. I was her transportation to school and after dropping her off, I would head on in to work.
Every day was a battle to get her to wake up in the morning and get ready for school. She just would not get moving in the morning. And every day, I would arrive at work 15 or 20 minutes late, with my stomach in knots from all the stress.