(in response to Hallandor) Katherine smiles, dropping down her pirate queen act a notch for the moment. "Believe me, friend, while I don't share your purity of soul, I do respect and value it. I would not propose a plan where there was no room for you to follow your consience and still aid us."
When the unknown patron coughs, Katherine first glances to the door to see if someone other than them is being signaled to an arrival. If the cougher is behind her she will not turn around, but look to those across the table to find out what they see.