Yuan's laid back, comfortable air certainly had an effect on Eva, helping her to relax a bit herself over time. It showed in how she began to converse a little (though that stemmed, in part, too, from the fact that his photos were just plain amazing).
His correction made her go silent for a moment, and then all she could say was "Oh." It boggled her mind that these were the castoffs. They were so stunning. Once they had gone through the photos in his phone, there was a silent pause as she tried to gather her thoughts. "You're really amazing," she said finally. And then a look of sincere horror settled on her face. Dear God. Had she really just said that to a good-looking guy? Oh no. She had meant as an artist, but that's not what she said.
The look of horror seemed to fade a bit as crimson crept into her cheeks, but now she was looking away and breathing a bit rapidly. It may have looked like she was going to hyperventilate. This is why she didn't talk to people.