Gumpy Bear has me re thinking this. I like the suggested Stacia angle.
I could not get over how tree stump dumb Brock and Afina were for going about it the way they did. Brock has met Declan twice, they have to know how strong he is by this point, and they know he is part of Team Demidova. Confronting Declan the way they did, and then making him enemy of the pack, is just monumentally stupid.
However, if they are being pressured behind the scenes by the European back, in an attempt to use Stacia to advance their kind, maybe it was all theater to distance themselves from her. Then they can’t be used, or forced into betraying Stacia. They cut ties with Declan, knowing she will follow him?