Now that the first guzzle of caffeine was well on its way into his system, Banning loosened up a little, and actually allowed himself to sag back a little lazily. Hmmm yes... much better. He nodded at her roundabout offer for more with a languid smile, but left it at that for now. He didn't want to appear too deprived or tactlessly greedy.

"Indeed... The family name I bear comes not without responsibilities. The... annual get-together ran out of hand a little, and I have yet to return home. I decided I might as well pay this twee library a visit now that I was in the area." he explained himself, with a casual-conversational lilt in his voice.

This sort of superficial talk he was all too practiced with. To sound both invloved and incredibly bored was an art form to him and he could pull it off nigh effortlessly by now.
People with a very keen sense of things might see through the ruse, but what would they find? Only more smoke and mirrors, other obfuscating defende lines, excuses and alibis.