3 things... 
1st: "there are so many guests" he says, "There is barely any room left to stand" he says, but then why, why is the room so empty!?
2nd: Why is the Blue dragon who is a prince doing the door opening job? That feels kinda crazy. 
3rd: is she drinking sparkling wine? Sparkling wine has alcohol... I know that considering their cultural advancements they wouldn't know its harmfull for the children... but still kinda crazy to see a pregnant woman drink...