She's got the scent of prey and he's chasing and it takes all his concentration that's not keeping track of where they are to remind himself that this isn't a hunt. Some instincts are harder to override than others.
It isn't long before he catches up. She's not used to being prey, that much is clear. She's also lucky he's not hunting.
He manages to catch her around the waist, spinning her around and up against a wall, pinning her wrists beside her head. "You don't run from wolves."