He does feel an appropriate amount of shame, at least.

"Mmm..." Viktor thinks for a moment. Now that he's actually paying attention to his body's signals, he's realizing that he is very thirsty as well, and that's probably part of why he doesn't feel well. Go figure!

"Let us start right now, before the wine, then."

He puts his plate down to grab a wine glass, and swirls his fingertips around its opening. Fresh water begins to swirl around inside the glass, condensing rapidly from the air. After a minute, the glass is full, and he hands it to Xander with a smile, then gets to work on the second.

Thanks for the useful party trick, Lioriley.