The series of photos and they way they are presented makes it appear Paulette decided to shred her pants as the day wore on. LOL!
...and Charlie put on a short sleeve shirt! I was hoping someone else would notice that. Charlie, Jr. eventually changed into a pair of jeans: http://www.corbisimages.com/stock-photo/rights-managed/U905877INP/charlie-chaplin-jr-and-sr-with-paulette?popup=1
HAHAHA, I didn't notice the short sleeved shirt or the jeans! I wasn't thinking, hmm, I wonder if she was bored on the boat one day and just starting ripping her shorts up?