There is actual panic that rises in Esta, then, though it doesn't show on his face, for it is very very far from the first time that Esta has had cause to panic.
He considers what forces might be applied to Mariona, but there's a problem; which is that this version of her is a masochist when it comes to lesser pain, and when it comes to greater pain she has only a commoner's vitality such that even Inflict Light Wounds would slay her on the spot. Did Asmodeus grant him spells about it, he could resort to torture, but not easily otherwise; and he will not use his only Heal without knowing it will be replaced.
Because the other thing is -- as you don't quite make 6th-circle without knowing at least in principle -- there is such a thing as torture not helping. There has to be some sort of aqueduct going from the Pain Lake to the Results Farm.
Esta stands up, as if angry, turns her back to her, as if angry, takes a few deep breaths, as if controlling anger. His fingers twitch, and he mutters something under his breath that is not in any language she's been given.
Then he turns back. "You do not particularly give the impression that you actually TRIED what I told you to try. Evaluate your memories without fear or favor, seeking the truth there whatever it may be, and then put your entire effort into making your Will save."
(His 3rd-circle domain spell could be Dispel Magic, given Esta's two domains of Arcane and Devil, but he has so little use for Dispel Magic that it is instead Suggestion and has been this whole time.)