What happened in the shop ?

Some may call it Hitchcocks first Mc Guffin. According to Truffaut Julia accused Roddy of theft in the store but the issue of theft never explicitly was mentioned. Tim was the person being guilty (on whatever). What i noticed is that Julia tried to be kissed by Roddy in their dance but he was just laughing about it. Then she made out with Tim while Roddy messed around as a cashier giving away a big candy box for 5 pennys. He easily replaced the difference to her before leaving the store. She invited Tim for another day. He probably was molesting Julia then and she wrongly accused Roddy on it as she couldnt forgive him. Or she had fun making out with Tim and simply had the idea on how to punish Roddy as she realized that his dad had enough money to satisfy her. In the flashback scene she talked about the money Roddy gave to her suggesting that he was trying to buy way more than the replacement of a bunch of candy. Probably the accuse was about sexual molestation so that Roddy had to leave school. However such probably couldnt have been told and neither shown at the time. In Paris Roddy saw himself becoming a male bitch for old rich ladies probably suggesting on what a tasteless community exists in Paris` district of Pigalle. The scene in which Tim throws away his candy box in the campus apartment probably was shown to confirm that he has been in the store and just took it with after his molestation and that he`s nervous about the issue. Does anyone think different ?