I completely agree that the Mom should come in for an hour or so the first day and I like to do it that way every time along with a playdate before the contract is even signed. However, I would tell the mother in your case that you are just way too busy to have her there. Also, there may be liability issues so tell her you are not comfortable with ever allowing another adult to stay at your daycare for a long time. That would be annoying and inconvenient to say the least. No way!