True self?

Have you ever looked at people when they didn't know you were looking? It's almost like it's a window into their mind. A lady in the car behind me at a stop light has such a sour face, it looked like she was just dreading what ever lay ahead in her day. Her lips were pursed, she was having to squint because of the sun, even with her sunglasses. But I just got an immediate feeling that she just absolutely dreaded going where ever she was going. I've also caught people with just a very slight shade of a smile of their face, while they're going about doing something. It's not a job they very particularly enjoy doing, but there is just a hint of a grin and a lil sparkle in their eye. In that case, I think that they are thinking about someone they love. It's almost impossible to tell if it's a lover, or a friend, or a family member, but the basic feeling comes through loud and clear. If I can only express this in my writings as to enhance the mood of the person instead of just making it seem wordy and excessive.

Here's a go at it in context to my story.

Jarei set about making a small campfire while Rocyn set up the tent. She took a short, sideways glance at Roc while getting the twigs and tender for the fire. Gods, he is such a good looking fellow. As she struck the flint and the spark flew into the tender, she had a tiny grin on her face. The spark died quickly the first strike, so she stuck the flint against her dagger again, and this time the flame firmly started consuming the tender. She set the twigs she had gathered over the tiny flames and they soon were caught up in the fire as well. Rocyn glanced over a Jarei to see how the campfire was going, and was witness to a beautiful sight. Jarei was a pretty girl, but now with the firelight dancing in her eyes, and just a slight smile was upon her lips, she was beautiful.