Kamlyn
What does coming from an orphanage have anything to do with manners, especially from hypocrites who claim to have some. Most of the classiest people that I know of came from humble beginnings. Its not wealth that defines you its your character. And it is very clear that there are several guests at this banquet that have none.
I don't understand what is wrong with this family. Sure they raised Xingren since birth, but normally if one hears their daughter is fake shouldn't they get mad? Then search for their real daughter and make up for the loss times. Normally the grand parents are the first ones who care about maintaining the family blood line. But on webnovel there are many stories like this where the family are blind and protect the fake.