Lady Krasaviza found that her words did not carry as much weight as her actions did. So she used her slaps to teach this loser a lesson she was sure he would not have otherwise gotten or understood had it not been for her action of slapping the shit out of him. The poor guy did not see any of it coming but he learned a lesson he had never been taught before.
Lady Krasaviza did not like how this guy was a poor lover. She was not dating him but she was seeing him for a few flings because he looked the part. But when the rubber met the road, it turned out he did not have a clue what he was doing. She was pissed and she slapped the shit out of him to make him find a way to better his skills.
Lady Krasaviza's choice of punishment is slapping. She knows that slaves can never get used to her slapping and that is why she likes it. She likes how painful it is as well as how she is able to turn their faces red with her slaps. She does not need a lot to slap a slave. Whether it is a slight mistake or a huge one, she slaps the slave.