Niklaus often was in a mood over something or other, whether it was Stefan with his sister or the fact that he was a half-breed that had been cursed. It just depended on the day what his mood would be. But sometimes he was actually able to laugh and smile and enjoy himself, treating Stefan like the brother he wasn't forced to put a dagger into.
Focusing back on Becks, he twirled her around and then tugged her back in against his chest, smirking down at the blonde. "Then what should we do tonight? Should we go have ourselves some fun? Find a nice meal and party until dawn?" That sounded like a good plan to Stefan.