Last week I posted that I had installed locking doors on my office and the master bedroom, in order to keep nosy SD17 from snooping around and messing with stuff. SD17 apparently just noticed this, and in realiation, she locked the door to her room just prior to leaving for school. Apparently she got ahold of another one of the generic keys for the interior doors, and thinks that she can keep her room "secure" during the day.