Thank you all so much for the comments and suggestions. I think I received one that covered every angle. It has been very helpful and given me a sense of validity in the matter.

And now... the rest of the story.

Renee went to the babysitter's house yesterday (it was better that I didn't go with her... I was afraid of what I might say). She asked if the babysitter was doing okay about the surgery. The babysitter said she was fine and not concerned at all. Renee tried to be very concerned and matter of fact, but in the end she broke down. The babysitter kept asking what's wrong. Renee told her that she was very concerned about Dane and that the babysitter wasn't taking care of him. The babysitter said, "tell me your concerns, you have every right to tell me what I am doing wrong." So Renee unloaded on her about what has happened. The babysitter listened without interruption or defensiveness. At the end, she said, "you're right, there is no excuse for this happening." She told Renee that she would make sure that she stayed on top of it. She apologized very sincerely.

The babysitter said, "if you ever have a concern, if you ever want an answer or if you ever want me to do something different, please tell me. He is your baby and your life, and I will do whatever you request." Renee said that she felt that much better afterwards.

We are still looking into alternatives. I feel better about things now, but I'm going to have a plan B, if I have to pull him in one day.

Again... thank you all so much for caring consideration.