James sat there couldn't understand what happened, he commented on her behavior and he didn't think she would be this mad than before. Diana was more upset than mad at him, her eyes told him that she couldn't believe and didn't want to believe what she just heard but sadly that word had already come into her mind and maybe her heart.
He remains silent because didn't want to waste on some stupid word that would turn the situation really bad. Diana also speechless she didn't know that James couldn't understand what he saw when Diana came into his place.
'What makes him sure that I behave like this into another man, what he think I am?' Diana felt a little upset because she never thought James didn't read her code, there's no other girl that acted like that if she didn't like him.