So, research effort to determine if she's still safe and sane-ish, to figure out what happened to her, and what she can do now. Priority in that order. Double check on Roger to make sure he doesn't have any nasties hidden in him. Otherwise, we do what we did with Bronn and pay them to stick around while we sort out what's what.
Beyond that, we'll need to do some immediate Spellcraft to determine if they're safe enough for research.
So something like
[X] [Subtle use of Magics to check for various ingrained traps and whatnot, to be determined by people who actually know how to flex access to 8th circle spells]
-[X] While working your magic, accept Jeynes's offer to keep her calm, and ask Roger how he fits into all of this.
-[X] Assuming everything is on the up and up, offer to take them under your care, research what happened to her, and provide them with funds and support. No strings attached beyond making sure that Jeynes is safe and sane. If they want to do more things within your Service, that can wait until they're settled in more and we've done rudimentary research on this alternative method to tell reality to sit down and shut up while the caster is working.