Mistress Jenny-Nina wanted to make sure that this slave did what he was supposed to do and because she did not want him to be under the illusion that it was ok to do what he had ended up doing, she chose to use her converse sneakers to trample him and she also ordered him to lick them despite the fact that they were very dirty. He had no choice but to do it.
This mistress did not want to wait for anyone to mess with her and that is why she chose to use her sneakers to dominate this guy. She did not care how old he was. And despite him being elderly, he was forced to do what she wanted and he had to endure being trampled by her converse sneakers which he had to lick first before she used them to trample him.
Mistress Jenny-Nina wanted someone to lick her converses. She had dirty converse sneakers which she felt were to be licked as opposed to being washed. She was wearing them and she did not have to look for someone from far. She chose to make her slave do it as he was closest to her and it so happened that he had pissed her off a few minutes earlier so it was a befitting punishment.