Sun Wukong had originally intended to sit back and enjoy the show; this sort of ruckus didn't count as a disgrace for Tian Peng. After all, it wasn't his first time getting drunk and causing a stir, nor was it the first time Sun Wukong had seen it happen. There was no need to interfere.
However, Chen Nuo had noticed Fairy Chang'e's embarrassment. Half of those present were laughing at her, and if no one intervened, there was no telling what might happen in such a situation.
So he nudged Sun Wukong with his elbow. It wouldn't be appropriate for him to step in, but given Sun Wukong's eccentric nature, if he were to handle it, nobody would think anything of it.
