Lady Nightfrozen needed to pass a message to this guy and she felt that the best way to do so was to use her heels. She went out of her way to trample the guy and to make sure that he learned his lesson through the pain that came with him being trampled. He did not want to feel that again so he changed as she wanted him to and they never had issues again.
Lady Nightfrozen has impeccable taste and style. But her new boyfriend did not. She had sent him to buy something for her but he bought something she did not like. She was so pissed at him because she needed to wear what she had sent him to a fancy party and now she had to go and buy for herself, wasting time in the process. So she gave him a taste of the pain only her high heels could provide.
This mistress likes to negotiate with her high heels. She knows guys come with all sorts of underhand tactics to the negotiating table and her underhand tactic is using her high heels when she fails to have her way. When she realized she was wasting time talking to this guy, she turned him into a foot slave and used her high heels to make him agree with her and do as she said.