It occurs to Josh somewhere in the middle of the woman nudging David to speak again that maybe he's being rude here. If David's in charge of this whole shebang and playing the part of a somber and serious host then Josh trying to shoot the shit with him probably isn't the best thing. His gaze slips between the woman and David with a growing sense of uncertainty, though not for the reasons David might assume.

David is his friend, after all. Why would Josh be suspicious of him?

"Are you sure it's alright,bro? If you've got stuff going on I don't wanna get in the way."