She is crying because she got caught! Plain and simple!
If she was forced to be with the guy she wouldnt be happy in those pictures! Dont you people get it?? She was very happy in the pictures, in the pictures with the bf in vacation! A person who is forced to be with a guy is NEVER happy! Even if it was a force happy you can tell in a person but Shelly was genuinely happy. That says a lot!