Goddess Andova likes to deal with people she can rely on and when she noticed that she could not rely on this guy, she knew it was time to punish and humiliate him so that he changed. That is why she used her high heels to trample him and to stomp on him as well. As he was naked, he felt all the pain the way she wanted him to.
Goddess Andova wanted this guy never to take her for granted again. He was her slave but he treated her as if she was an equal. She was not going to let that go on and so she used her foot to punish him. He was forced to strip naked and then she spat into his mouth but after she had tried to tear his mouth apart with her foot as she inserted it into his mouth.