(urth) Sev's silence about Catherine

[thalassocrat at nym.hush.com]

This has probably been pointed out multiple times, but surely by 
the end of UOTNS Sev knows his mother's story. We're told 
explicitly that Gurloes and Palaemon must know the parentage of the 
apprentices (Shadow VII). I can't imagine that Sev would not have 
gotten the story from Palaemon in his meeting with him at the end 
of Citadel. Or if not from Palaemon, surely from Ouen.

But Sev doesn't want to tell us, for some reason. 

Similarly, he doesn't record questioning Ouen about Catherine in 
detail. Maybe this is because he'd had it all from Palaemon 
already, or maybe he's once again just not telling us.

I think Sev's silence has to mean something, but I don't know what.