If it's a drastic assumption to make, Thor is making it as well, given how little he reacts to her (perhaps) forward statement. Yule is a time for celebrating the turning of the Wheel with friends, and he has so very few left. Anyone still surviving is welcome in Asvera, Yule or not.

Dancing today, however? He gives her a mildly nervous smile, but doesn't shy away from the possibility. "I could be persuaded. But I think we need to get something faster out of the band, don't you?" He knows perfectly well how to dance in formal, slow styles as would be seen at diplomatic events, but this is a party. And parties are for drumbeats and dancing hard enough you have to stop for breath.