Lady Zora got her slave to lick her dirty boots as well as her dirty floor. She did not care what happened to him as all she wanted was for him to do what she had instructed him. The poor guy was degraded as well as humiliated but it did not work and he had to do what he had been instructed to do however degrading it was to him.
Lady Zora was not impressed with this guy's work ethic and she had to make sure the guy learned to improve his work ethic. So she used her boots to crush him and she spat out some food she had chewed. The guy was made to eat the food she had spat out as well as lick the soles of her boots. That taught him the lesson he needed to learn.