Derek wasn't a prude by any stretch of the imagination, but since his werewolves didn't fully shift, they didn't have to deal with the casual nudity the way others did. He was ready to pull his own shirt off to offer Tera when she put her own on and introduced herself.
"Yes, I have, Tera," he said with a nod. "I thought your scent was familiar." He assumed that she was able to tell he was a werewolf by his scent if not by his association with Jeremy's Pack. "I hope I'm not disturbing you."