Confirmed
Ruth was willing to believe that this guy wasn’t Keith Urban after all, but he could answer every question without fail. Ruth felt a bit flustered.

Confirmed
Had she really given a millionaire money for his groceries? When she finally accepted the truth, it was only then that she noticed his bodyguards. Ruth said that she was star-struck, but that Keith Urban was very gracious about the whole entire incident. He was a very humble man.
Embarrassment
When Ruth was absolutely sure that Keith was who he said he was, a bunch of embarrassment washed over her. She had been scrutinizing him for minutes and doubting his story. Her cheeks flushed and she was bright red.

Embarrassment
She was worried that she might have offended him, but he just laughed it off. Ruth couldn’t believe she had bought groceries. It was quite a remarkable event to be sure. She simply couldn’t believe it.