In part 4 of this series, Maya Sinstress attacks her ticklish slave's feet with a hairbrush and then her fingernails. He is weak and vulnerable from an hour of previous tickling and he can not resist laughing and struggling. His feet are by far the most ticklish. His suffering makes Sinstress laugh tremendously. She sneaks in a couple ball tickle attacks while he is helpless. Sinstress is worried he will from all the tickling.