Like the previous comment said her only chance is to slip up in the mask parties and run away very FAAAAAR from the palace , the prince will obviously discover her since he is so near to her 😓
@Hounder : Nah, this is european style, so obviously it has to be the MYSTERIOUS MASKED PERSON, who despite having only just the mask and maybe a cape at best, NOBODY could recognize them.
(Seriously tho, there's precedence with the prince and 'who's this mysterious boy' Marie ran into)