Mack had just been staring at his shelter, trying to figure out what else it might need. He hadn't expected anyone to show up and offer help. He didn't particularly need it, but he thought it was nice of the attractive woman to offer.
He flashed a smile, the kind that let people know he was friendly.
"Hey, I'm Mack."
To answer he other question, he added, "I think my shelter is in pretty good shape. I'm just being a perfectionist at this point."