"You don't believe me, do you?" she asks flatly, almost challenging you.
"It's kinda hard to believe, to be honest," you tell her.
"Oh yeah?" she says, stepping out from behind the counter. "Watch and learn. You're not the only wolf in the store today."
"Wait? You mean you're..." you start to say.
"Yeah. Now pay attention," she says, peeling her shirt off over her head, standing in her bra. She points to a disco ball that hangs from the ceiling, which you hadn't really noticed until now. "Check that out, what do you see?" she asks.
"I see a disco ball," you reply.
"Keep staring at it," she says, "See how round it is, round and full...like the moon?"
"Kinda," you reply, not really getting it, but you could see where she was coming from.
"Just..keep staring at it..." she says, her voice beginning to trail off, a dreamlike quality entering into it. "Concentrate on it, so round...so...so...moon...." she says, again drifting off.
You stare hard at the disco ball, trying like hell to picture it as a full moon, but having little success. You glance over at the clerk, and see black fur blossoming up her back and her spine beginning to contort. It's happening slowly, but it IS happening!
She looks over at you, smiling, her teeth growing more daggerlike and her eyes blazing yellow. "It MUST be a full moon," she tells you in a baritone voice, ridiculously deep for her size, "because werewolves only change in the moonlight!"
You look back at the disco ball, and coupled with the sound of the clerk's transformation, you now begin to see the moon. The ball itself wavers before your eyes, disappearing only to be replaced with a full moon! You can feel the moonlight hitting your flesh, which suddenly begins to boil with an unnatural heat.
You tear open your shirt with nails that are more like talons, feeling your muscles swelling. You look over and smile at the clerk, whose bra has fallen away, and whose skirt has also fallen off, revealing a distinct lack of panties.
She snarls at you, curling her lips as her face begins to stretch into a muzzle. But this snarl wasnt one of warning; it was one of lust, and you smell her musk permeating the room.
It further fuels your change, coupled with the "full moon", you shred your pants as your own muzzle extends, and you turn to her, snarling in return.