maybe they kept her nude, this way when she did eventually die, they wouldnt have to worry about the clothes she probably had on for days and she was dirty and smelly and someone mite question her condition.....you people were in here with her and she is in this condition?
who knows what she went thru in the days before she died, did they say what her stomach content was? i mean did they bother to feed her?
I believe the reason for her nudity was in keeping with the storyline that she wanted to be like Marilyn. Remember, Marilyn did sleep in the buff. If you're going to pose a death scene, you have to try to stay consistent.