Bella felt a bit awkward because of William's attitude.
Even though they had agreed that he wouldn't pretend to be her boyfriend, now that they were at her father's banquet, William should show some respect.
He did present a birthday gift, but addressing someone by title is a common courtesy.
Simply saying "Happy Birthday" so bluntly, felt somewhat disrespectful to her.
"Dad, William is a bit shy. Please don't mind it. Let me take him to have a seat," Bella hurriedly said, pulling William to the side.
Brian Bell frowned, a mixture of emotions evident on his face. "This is what you call shy?" he thought. "He had the nerve to give a gift with a smile, but can't bring himself to call me Mr. Bell?"
Without concerning herself with her father's thoughts, Bella led William over to where Emily was seated.