Judith had a point that the chimera could pick up his scent, and he wasn't sure if it was worth the potential risk to get some coffee and get her scent. He had a few minutes to decide though, so he settled back and listened as Judith spoke.
Derek preferred to keep his connections with other people fairly superficial. It made it a lot easier to deal with them if you didn't become emotionally involved. Losing his family definitely colored his feelings there. "I am more than willing to help you out any time, Judith," he said.
Nevermind that he preferred to keep a distance between him and other people. Judith had somehow managed to worm her way past his defenses within minutes of their first meeting. Derek wasn't sure how much of that should be chalked up to the fact that she saved his life and how much was just the kind of person she was.