Ben is laughing and drinking beer. He doesn't look on edge at all. He's there to make things look worse than they are (and maybe on the off chance something does happen, since CK grabbed a wooden stick from B2 and looked like she might hit someone with it). Trish keeps doing like Vance did with Josie, forgetting she's supposed to be mad and yelling, then remembering and giving some half ass "insult".
CK and Brian seem convinced it's real though and aren't even responding back to her. They're both betas.