This was a pleasant surprise and Jasper was elated to smile back, forcing himself to scale it back quickly then stand rigid with only his arms flung around Jan to catch her without leaning in too dangerously close. This was going to have to come out without dalliance, otherwise he was going to come off unreasonably standoffish. That was the last thing Jasper wanted. Her concern could have been a segue to take advantage of, but it seemed impersonal in the hallway and Jasper much preferred to ask, "May I come in?" That was another inconvenience to contend with, making his hug awkward, but he discovered very early on that there was an absurd truth to a vampire's biologically demanded politeness. The blood thing he understood, on some level, and even the UV intolerance, but there didn't seem to be an explanation for requiring to be invited into a private home beyond 'magic'. More research in the future; for now, Jasper hoped he at least seemed warm, if a little anxious, and that not because of Jan.