Slave Tillie is assigned her position for the night- sleeping in bondage, at the foot of the guest bed. Sometimes her owners make her provide service to whoever is staying in the room that night- but somehow it is even worse if she is made to sleep in such a humiliating position when there isn't even a guest staying! Then it is just a matter of pride in her own submission that stops Tillie sneakily climbing into the bed. Or stealing the corner of the duvet, at any rate, which might be the maximum the bondage would allow....