It was a thought Pel had had as well, but she doesn't want to give Herian the chance to get worked up. Well. More than she is usually worked up.

"If they are or they aren't, they're going to pay." She looks at each of the other two women, her pallor overtaken by a steely look. "We're on the same side, and have the same goal. And if a mage was leading the ones who murdered Guenievre, chances are the Keeper let it happen. If not, she'll be surprised and angry at one of her apprentices, and we can leverage that anger. But if the problem goes to the top, talking is going to be little more than a formality. Soon as we know that's the case, we ought to get out. Most Dalish would rather fight to the last than budge once they've made up their minds."

That last was for Herian's benefit, although Pel suspects she already knows it, or at least believes it.