@UglyDuck From what I understood it isn't rape per se but rather there are people who witnesses/watches the consumation of the marriage. Since many women are forced upon these marriages, I'm not surprised there's a big overlap with rape and people watching that makes it even more disturbing
Actually that nocturnal tradition actually existed in many European kingdoms. Even commoners did it because these people would be witnesses to the legitimacy of a marriage by watching it's consumation. If a marriage was not consumated, it could be annulled