The whistle had definitely been to almost offend Derek, to direct the brunt of his aggression to him, and when he gets the desired result he just smirks in response.

And then Derek lunges, and Nathan pretends to try and get out of his way as he attempts to dodge him. If he’s easy prey, he figures, he’ll get bored. He has to make it interesting, right? Either way, though, despite all the training that Reginald puts them through, he can’t compete with the level of agility that Derek has. He feels the way his claws dig into his shoulder as they go down, and Nathan tries to keep him engaged (or, rather, focused on him) by trying to fight back.

But then Derek’s focus shifts and Nathan’s eyes widen as he realizes what’s happening. Derek is faster than he is, but still, he kicks as hard as he can to knock Derek off balance and trip him before he can run after their sister.

“What, done with me already?”