This mistress had tried her best to get this grandpa to stop being dirty in terms of his speech as well as in terms of his actions. When he did not stop, she felt that it was time to punish him and she did it with her shit. She turned him into a human toilet and she had him eat her poo and drink her pee. She felt pity for him and she jerked him off.
Mistress Gaia wanted to exercise power over this guy and she felt that the best way for her to do it was to shit on him and also pee on him. He had never had any of that done to him and he was scared shitless as she did her thing. He did not want a repeat of it and that is why he let her do whatever he wanted.