Mistress Jolie was bored with this guy and she did not want to deal with him anymore. She had to scare him so that he would stop following her around or contacting her. He was boring and there was nothing she was going to get from him. So she used her jerk off instructions to make him do it. She humiliated him by making him jerk off to weird instructions and he ran away.
Mistress Jolie needed to try stuff that she had never tried before and that is why she chose to use her jerk off instructions to do it. The mistress felt that the best thing to do to him was to make him humiliate himself and the mistress enjoyed watching him do it. He could never imagine what she made him do but there was nothing he could ever do to stop it.