Mistress Amanda believes that there's no thing such as too harsh punishment. And she also makes sure to demonstrate that to her disrespectful slave after he spoke back to her. She makes the slave truly regret his inobedience by whipping his back strong and long enough that every inch of his skin aches and burns.
The whiny slave's back turns into red, Mistress Amanda's favorite color, surely not letting him forget this punishment for a long time.