Kitty takes on Nicole and tries to make her break. Nothing erotic occurs here, only pure brutal beatings without any hint of power exchange. Nicole is elegant and poised through her ordeal, and in the end it is Kitty that falls short of her own expectations.
Excellent discussion pre and post scene affirms that Kitty is not familiar with the equipment and also because Kitty has "never walked a mile in her moccasins," she doesn't understand what her submissive has endured.
At three separate moments into the 4th chapter Master Len covers the lens with his hand to provide direction, and effectively obliterates any possible momentum.
Retailing: Brutal canings not for the faint of heart.