Why does Goddess Matilda whip this slave? Because she can, naturally. She was relaxing watching tv when she had the urge to a male, and the nearest male would do just fine. After some whipping and suitable groveling on his part her sadistic lust is satiated, so she puts the slave away and goes back to relaxing in front of the tv. She never needs any reason to make her males suffer, they suffer because her whim desires it.