Zhao Changhe realized a serious problem.
When they only wanted to annoy each other, it was actually a good thing. Not only would it not cause real trouble, but it might also lead to helping each other out. Emotions that were not yet certain could be stimulated and actually get them caught in the game.
However, that wasn't really a Chaotic Scene. It's more accurate to say that he was just a tool for tearing them down.
If it was real jealousy, then things could get pretty serious.
For example, when faced with a "choose me or her" dilemma, that's when the true bloody conflict would ensue.
It's directly proportional to the depth of the feelings; the more you like someone, the less you can tolerate the presence of others, the less you want them flirting around. If not handled well, it could all end in nothing.