Can a monarch overrule previous monarchs? Not so with the Papacy.
Sure they can, all the time.. The difference is, all the remaining monarchs today are figureheads.
Think of a bow and arrow, or darts. It is not wrong to miss the target, but all can see that the target was missed, when the goal is to hit the target--and the center of the target at that. It is not wrong to have sex. It is wrong to desecrate a holy place. It is not wrong to set a fire in a fire place. It is wrong to set a fire in order to burn down a forest, someone's home or business, etc.
Societies have agreed nothing is wrong. Those are known as anarchies where the cruel set their own rules.
Actually, you miss the point altogether. The priest in question and the two dominatrices were consenting adults. Therefore, there was nothing really wrong with what they did. That he felt differently about his church than the dumb-asses who come there every week and throw money into the collection plate is between him and his congregation.
I hope that he is a lot happier doing something else for a living.