Shepard keeps her face neutral - Iorveth is allowed his opinion, misguided as it might be, and she has no reason to harass or antagonize him if he'd rather leave.

"I'm trying to find some answers," she says bluntly to the turtle. "I ran into Victor here and we decided there's safety in numbers, since we're here for similar reasons. I won't turn down more help, if you're offering."