Wow, this thread realy surprises me.
Maybe the boss had the right to ask if she would be back, that is ok with me however....
Some posted that "You should have a back up plan ready"

It would be the end of the world before I EVER had someone else watch MY CHILD when she was sick. That is MY responsibility as the parent. Not my mother, father, neighbor, good friend whatever.
Another boss commented that he was happy only one of his employees had children. How sad is that???
I know that not all jobs give you the flexibility. However, I would quit my job and find one that does before I jumped through hoops everytime my child got sick.