I'm sure I'm not the first person to think of this, but I have an idea about why Curran blew Kate off for dinner.
I think it's because of all that blood in the last book. Kate's always so careful about letting her blood get found, and there was an awful lot of random blood flowing around and not getting mopped up. I wonder if Curran found out, and now he's not so sure what he's planning to mate.
Like I said, I'm probably not the first person to come up with this theory. It just struck me this morning, though, so I share.