No one apologized to Twilight after she told the truth about the wrong Cadence. After the wedding, they have a conversation with her. Especially with Princess Celestia.

Thanks to wingdingling for editing this fanfic.
https://www.fimfiction.net/user/209410/wingdingaling

Made a fanfic reading of this:
https://www.youtube.com/watch?v=pTRBJxy6R4E&t=30s