Irene smiles again- and this time, her eyes are in on it as well as her mouth. That doesn't mean it's particularly pleasant, of course.

"Pleasure," she says easily, all that hardness and coldness completely gone from her eyes; it may as well never have been there. She's friendly and responsive now. "I'm Irene." She holds out a hand. "Don't worry."

Don't worry about what is the question. Honestly, Irene knows less than she's letting on. The facts are these; 'Sarah' has been tracking someone, and could get in trouble for it, judging on her split second reaction. But that's all.

So, her plan is to bluff until she knows precisely who and what she's dealing with.