Derek lets out a huff at the teasing, but it does make him relax a little. Thomas comes closer and Derek doesn't move at first, not wanting to spook him, but then once he's close enough Derek leans forward and presses his head up under Thomas' hand.

There's that deja vu again, that momentary ache, but he ignores it. He lets Thomas feel the softness of his fur and see for himself that Derek isn't going to hurt him.