If it's being used for daycare kids napping then that parent should freely be able to access it. I have a separate daycare area where obviously licensing is free and parents are free to go...but on the rare occasion I go up stairs to my home I always prepare for the unexpected parents to ask to go upstairs and look around or my licensing officer to pop in. That's the name of the game. There is no privacy if your using your home as a daycare. I would suggest finding another room for napping and keeping your bedroom private/door closed.