While Kael seemed to have been quietly listening to Arlo, the wheels in his head had actually been turning. Now a lot made sense to him.
Arlo said that their souls had been switched, that would explain why his wolf had reacted to Naiari in Yvette's body. His wolf had probably sensed his mate's soul but there had been a disconnect because it had been in the wrong body.
That was why when Yvette had come in her body he had been so crazily attracted to her and still repulsed by her at the same time. It had been because it was his mate's body and he had been drawn to her inexplicably.
But immediately they were back in their bodies he could no longer bear the thought of touching Yvette or even being close to her. No wonder her behavior had been so different from when she had been in Kwall.