Ketar follows along. Or does his best, anyway. She's impressive.
Her emotional state, which is what he's paying the most attention to, is...disorienting. (Also he had half-forgotten that, while he knows the contents of Carissa's head rather well, Carissa hasn't even seen his face before now.) Is she in trouble? He's not sure! She's calm about it, if so, but...she would be, it's a survival skill in her own world, her home country is horrific (and it's still kind of background upsetting, almost hurtful, that she's seeing the Empire as similar.)
She certainly isn't thinking about Altarrin in the way she would if she actually wanted to be sleeping with him as a temporary fling, let alone as though she's on a path to falling in love with him, so - the inference is that she's faking her side of it entirely, as a survival strategy. Which doesn't imply that Altarrin is treating her badly, of course - and Ketar would, on reflection, actually be surprised if he was - but it's still a sign that she feels stuck, right? Maybe more stuck than she should, because her own world is horrible.
(What sort of punishment is she hoping she would avoid, by being pregnant?)
(He wonders what happened, in Cheliax, to give her that little mental flinch.)
Ketar isn't entirely following the part about intelligent people from other worlds. In actual reality and not the cover story, Carissa's magic definitely doesn't run in the blood, but - does depend on intelligence, and so it would be in Altarrin's interest to have a smart child with her. Is that the sort of thing Altarrin would push Carissa into doing? Ketar doubts he would hold back on account of it making Carissa sad, but he would probably...pay her, or something? for the unpleasantness? ...and also it's a long term sort of plan and, while Altarrin is definitely someone who makes decades-long plans, he's not going to decide on one less than a week after Carissa arrived, so probably Ketar doesn't need to do anything about it?
He definitely isn't going to ask her to restrain her thoughts to avoid being rude to him. (Thoughtsensing checks in the Empire don't have that convention, though sometimes particular questions are asked.) He's tempted to ask her to slow down her thoughts, but - that sounds hostile, right? And he's probably missing things, but he really doesn't think he's missing a scheme to murder all of them and escape. Beside, faster thoughts means more information, right, as long as he can keep up.
He doesn't prompt her with anything yet. She's thinking plenty of informative thoughts on her own.
:No specific concerns about her loyalty so far: he relays privately to Merda, in case she's still nervous about that.