Wait okay so we all know Cardan stopped Locke from dancing with Jude at Dain’s coronation. I just realized he knew Jude couldn’t pull away from Locke even if she wanted to, since mortals can’t stop dancing once started unless someone stops them or until the music stops. I think when Jude started tearing up Cardan realized she must have wanted to stop, because she would never willingly cry in front of anyone, especially an entire room filled of folk. So he intervenes and ends up dancing with her, letting her go shortly after probably because saving her from dancing was his intention in the first place.

It makes me think about how Jude sees Taryn after Cardan gets Locke away, when she wonders if Cardan said anything to Taryn because of the look on her face. I imagine Cardan had said something, and that it was to push Taryn to stop their dance. When Jude is about to cry, maybe he realizes that even then Taryn won’t do anything, so he gives up and stops it himself.