If anything her and the group were useful to him. They supplied him with coins and other objects he desired. Hurting them? Wasn't exactly in his best interest. So of course her offering was a welcome one. Peering into it a moment, before it disappeared into a small zing of magic.
"Ah. Of course. I could offer you locations of tombs I need if your...adventurers are looking for danger." He could go himself, of course, but it was less fun that way. And besides, that would leave even less for adventurers and thief's to do.