There's a lot to upack in a few sentences, but he's stepping aside to she if she shows up in a mirror nearby before it occurs to him that he really doesn't know anything about how vampires actually work. His gaze lingers a bit on the mirror before he turns back to the amazingly young looking woman.

"Metabolism is a large part of my problems with this. I have abilities that burn through more calories than I usually eat, so it's hard to keep up with all of it."