
Why he was shocked n shit? Cus of cha's pheromones?

I highly think it is. Because maybe Cha didn't want to make a huge scene, he just talked in a calm manner but he was oozing with anger and possessiveness so he let the man know that through his pheromones, like "if i ever see you tryna hit on my man, who happens to be my child's mama, imma fuck you up and shit". And since — i think— that the man was the only alpha in the room he was very shocked and quivered in fear, while the others were highly to be betas.
And let cain have the jooin... both deserve better than that trash boy