Nothing was said about your culture. If you had a basic level of intelligence, you'd be able to understand that I said you just cant push your culture onto a story about someone else's culture. The same rule would apply to us if it was an English or American story.
But if you REALLY want to go into culture, let's talk about how your entire "american" culture isn't even your own. How your "American culture" actively looks to destory the NATIVE American culture and its people. Let's also talk about how your "culture" only seems to accept the white, English speaking while actively feeding off the oppressed countries within it's reach.
So if anyone is truly disrespecting "American" culture, perhaps you should look at home. Because thats where your issue has started.

Reminder to our lovely western reader, when a stories is based on another cultural, you cannot apply your western ideologies to it. Concubines have been an important part of eastern Asian culture for a long time. Most of the time Concubines are not placed in for love. It is for political power and strength and often, they are placed in by the crowns advisors rather then the actual sultans/emperor.
It's okay to feel a bit unsure, but using terms such as "cheating" when, culturally this isnt seen as cheating because it is normal (something even Tei was aware of by the old ruler).
Be mindful and open to other cultures and eno9y the story!! <33