Sometimes it pays off to give into people's desire, if anything, just to instill them with a sense of hope and security.
The truth of the matter is that the Guardian didn't trust the Shaman. Not because it was her, if anything it testified in her favor, but because he trusted none, himself included.
They were all humans, they were all fallible and prone to mistakes. What was the Abyss if not the monument of humanity's moral decline. Of course, some people were purer than others. Aurora was probably much purer than he was.
A kind of purity which needed to be preserved by keeping her away from the hard choices. The hard thing about hard things is that they're painful.
Anyway, he nodded. "Hmpff, whatever"
At this point he was quite content with the way the night had gone, though... "I have a question, but I'll keep it for another time"
Fine by me, and sorry for the lateness