You dream.
In your dream you see the innkeeper. She's in a silk white gown with a fine cloak of black fur. Her hair is worn in a decorative bun. She smiles at you and her silver eyes seem to glint. She strides inside the room, which turns into a luxurious boudoir around you. The door closes behind her and she looks at you expectantly. You realize she's expecting you to take her cloak. You stand up immediately and take the cloak, draping it over your arm. She releases her hair from it's bun and allows it to flow down to the small of her back as she slinks over to a plush red love seat. She smiles at you and beckons. It occurs to you that you have no real reason to obey her, but you walk over to her anyway. She cups your face in her chin and give you a small kiss on the nose and points you to the coat rack. You nod and walk over to the rack and place the cloak upon it. She looks at you over her shoulder and smiles, she directs her gaze to your arm. You look down at your arm and see that some stray hairs from the black cloak have come off on your arm. You try to brush them away, but they don't move. In fact, they multiply. With every wave of your hand they seem to be getting thicker and thicker. You stare as a thick patch of fur develops on your arm and travels down your to your fingers, which curl up tightly against your will as claws poke out of the second set of joints.
"What is this?" you ask, or try to, but it comes out wrong. Sharp fangs have grown in among your teeth. Your shoulder pop uncomfortable as the fur reaches it. Your muscles and shift and move as if they were clay being formed. Everywhere the fur travels your body shifts. You're soon covered in the stuff. You stumble forward as your legs shift. Your body quickly acclimates to this position and you find yourself unable to stand on your hind legs comfortably. Your ears shift back and you become aware of a new appendage behind you, a tail.
"Good." she says as she touches the top of your head. "You'll do nicely, pet." she says. With that you wake up with a start. The sun is shining through the window and warms you comfortably. You roll onto your back. Then you become aware that something is very wrong, both with your thinking and your body. You stand up and stretch, arching your back and then pushing your paws out before you. You shake your head and make an odd high pitched sound of surprise.
"So, pet, are you ready to start paying for your room and board?" the innkeeper asks as she walks in with a small collar in her hand. You don't want to accept it, but you know it's true. She's somehow turned you into a cat.