She should have thought of it. Abrogail had overheard Keltham's thoughts about Civilization's great weapons. She'd heard the report of him asking a fake paladin about ways to obliterate Awaiting-Consumption or injure Urgathoa.
It was just - not a thought that squared up easily with the naive teenage boy giving away so many key secrets to Cheliax, who boasted of having never told a single lie in Golarion -
One just... doesn't usually think, of that, as something that a regretful teenage father would do. Especially one you've started identifying, in the back of your mind, as a naive Goodling.
'Oh, I'll just destroy that entire country before my children can be ensouled. Problem solved!' It's really not... not something a Good person would do, or an Evil person either.
Or maybe Keltham will only destroy Egorian, to get at Abrogail, if Keltham thinks it's only her that's pregnant. Which... still would be not good for Cheliax's ambitions.