She is asking him to be patient with her and yet has just made him happy beyond words at the possibility. He'd move the moon and stars if she wanted. Patient? That's too easy, too little. Aleron always presumed the lack of little ones in that order was a personal choice not to have a family due to the dangers of their work.

"Of course I would be. But... you are certain that you would be in no danger?"

Because that is what he fears the most. Not that they could possibly not have children, but that so doing would rip her away.