Harder on Mommy?

I took Wesley in to Wee Care again today (we went on Monday as well) just to hang out in the room some more and get used to the teacher and other babies. I left the room for a minute to run a check down to the director's office. On my way back to the room I heard a most familiar cry. I quickened my step and when I got there the substitute teacher (his regular teacher was at lunch) was holding him. He was sitting up when I left, had fallen over (a very normal occurence which usually doesn't elicit tears) and she said he had been fine until he looked up and realized that she was not me... then he burst into tears. His cry sounded like the ultimate in abandonment. I, of course, scooped him and he stopped crying... but this doesn't help with my fear of next Monday. Tell me that my son won't feel like I've abandoned him. Tell me that he won't think the one constant person in his life, the one who is ALWAYS there to comfort him and smile at him has just decided he isn't important any more and left him. Monday might just be the hardest day of my life.