Mistress Gaia did not want to be associated with bigoted people. And it was unfortunate that her next door neighbor was one. And he did not hide his bigotry. So she chose to teach him to shut up or accept that his views offended people and be ready for the consequences. When he chose to accept the consequences, she choked him as punishment and told him his that his views deeply offended her.
Mistress Gaia wanted to try something she had never done before. She settled on ass choking as it was something which looked like it would be fun. So she waited until her slave messed up before she ass choked him for fun and as punishment. He was shocked as it had never happened before and it made him fear her even more as he did not know what she would do next.