There is nothing in this world that humans do that can be considered "normal". Your are enforcing you social conventions onto a site that literally has rape, porn, and incests that mind you, you are actively using, and therefore fostering a space for that with your enabling/use. But because this story contains a topic of slavery, you draw a line? This fictional story, that you deem not normal, like obviously, but who cares?

some of yall just need... help. i hate to break this news but this behavior is NOT normal