This could've be resolved day 1 of the prince taking care of the other chick by just explaining to the mc about the situation and keeping her up to date on what has been happening; couldn't speak to her? Write her a letter. And even being firm with the other chick to quit it with her nonsense. "Oh, if we turned it down the guy would have been persistent and you know how he can be" no, you are just spineless. You let this misunderstanding happen
This could've be resolved day 1 of the prince taking care of the other chick by just explaining to the mc about the situation and keeping her up to date on what has been happening; couldn't speak to her? Write her a letter. And even being firm with the other chick to quit it with her nonsense.
"Oh, if we turned it down the guy would have been persistent and you know how he can be" no, you are just spineless. You let this misunderstanding happen