Mistress Virgie was pissed about how dumb her new slave was. She had to teach him a lesson and she did it as cruelly as she could. She wanted to teach him a lesson so that he could learn to improve himself. She wanted him to become sharper and the best way to do it was to humiliate him. So she used her giantess fetish to crush him. She told him she would do it till he changed. He did.