Just a general thought.
Most likely all of these sets that you have been looking at were probably shot all over the same day. So if this was her first outing into nude/nonnude photography world then it is not unusual that all of these sets would be nonnude until she decides to do otherwise.
I draw this conclusion by looking at her surroundings from the glass balcony scenes. Notice the PT Cruiser across the street does not move from its parked position, and also notice the Saturn down by the dumpster does not move from it's parking spot for several sets.
H.