In part 3, Mistress A. is hogtied and tickled, with special attention paid to her ass, which turns out to be excruciatingly sensitive! Mistress A. is taken aback by this new discovery, and lapses into silent laughter while her ass is tormented with super light tickling, which seems to work best, and keeps her in hysterics. Mistress A.'s feet and sides are also tickled.