Seems like there's a lot more going on between the fey and the agency then just the hunt and the Treaty night.
Seems like Winter is easy to anger and both of them are quite tall. Their also rather lovely looking (especially Winter), that probably makes them extra dangerous.
The Moraine is quite good at playing this nonchalantly. :)
The Fey are all stuck-up jerks.
In every single story they're ever in!
Which means it must be true! Because if you repeat something long enough it becomes true! (This is especially true when magic is involved...)