Klaus did not understand what had her so mad at him, what really had he done. Truth be told, his reaction to what Rebekah had done had been a lot more understated than it would have been a few short months ago. Out of Caroline's influence. He thought about her now, what she'd want, how she viewed him. That weakness that love was, not that he'd change it but sometimes he just wanted her to realise how much he had changed just to appease her. He wanted his family to understand that things would not alter overnight. He was still Niklaus and he still firmly believed this was the beginning of a downfall for the family. Rebekah would leave, Elijah would see it as an excuse to marry his whore and Kol, well who knew what Kol would do besides gain a great amount of influence in hell.
But when Caroline had stormed out of their hotel room furious at him, Klaus had known he had to follow her. Had to work this out. Things as they were he refused to spend their time, their holiday, fighting. And so he had tracked her down, a combination of hybrid senses and the fact that frankly she'd really only be one of a few places. Where she was was unsurprising and Klaus also compelled his way in without even really thinking abut it.
He stood a ways away, just watching her, ignoring her beautiful surroundings and focusing on being annoyed at him probably.
"Alright love, talk this through with me, what have I done now?"