Mistress Gaia hates liars and she felt that this guy was one and he deserved to be punished. And that is what she did to him after she had crushed him with her ass and smothered him into a tiny man. He regretted why he had lied to her and he wished that he had not done it. And that is how the guy came to stop being a liar.
Mistress Gaia was so offended by what this guy had said about her that she had to show him her true colors. So she teased him and being naughty and sexy, he could not resist her. But she denied him and humiliated him. Then she ass crushed him and turned him into a tiny man then she tormented him and warned him never to try that again with her or else she would do worse.
Mistress Gaia is a hot giantess and she used her giantess fetish to send a message to this loser. She did not want him to make any mistake or to take anything for granted. So the mistress used her high heels and her giantess prowess to send a message. The mistress got the guy to watch as she turned the toy into a tiny version of itself and she warned him that the same would happen to him.