Probably jacking off in happiness followed by self-flagellating in shame repeatedly at the news that in fact the Russians do have personal and financial info with which they blackmailed Trump (and that Trump responded by cooperating with them--fake news!). Pence is off planning his own swearing in after Trump's swift impeachment.
I find it doubtful. Pence has for the most part tried to keep his nose clean. If you'll remember sitting the VP debate he specifically acknowledged Russia as an adversary and Putin as a threat, and Trump rebuked him for it. From the beginning I've thought that Pence has only been in it for the possibility that he'll get to be President. He must know as well as anyone what a moron he's working for.