Goddess Gabriella and her friends wanted to torture these guys because they were too loud for them. They had to make sure that the guys learned not to be as loud as they were and that is why the mistresses had to do what they had to do. They made sure that everything was as painful and as cruel as it needed to be. So they rode the guys' backs and made them human ponies.
Goddess Gabriella and her friends had realized that they had let their human ponies to do what they wanted and they were now abusing it. That is why the mistresses had to make sure that they taught them a lesson they had never learned before. That is how they were pony play trained and it was brutal and humiliating. They tried to beg for mercy but their pleas fell on deaf ears.
Goddess Gabriella and mistress Cleo and lady Scarlet had missed riding the backs of their human ponies. They loved doing it but since they were busy, they had not done it in a while. That is why they had to do it today as they had the time to do it. The mistresses went hard on the human ponies and they cried as they could not carry them for as long as the mistresses wanted to be carried.