"Mommy, will you sleep with me"

I hear this little voice say this to me around the same time early several mornings throughout the week...typically between 2:30am and 3am.  It's Collin waking up to notice that I am not there and has trouble falling back to sleep.  Most times, I go back to his room with him, tuck him back in bed and then leave after 5 minutes.  I decided to lay down this morning because I was so tired.....and then woke up at 5:25am....just in time for the 5:30am alarm.  I had fallen asleep on the floor for 3 hours.  Surprisingly, I am not sore today from doing it.