They were words she'd spent her entire life hearing. Then out of nowhere, they were exposed as lie. Now she isn't sure how to handle hearing them again.
There is one specific moment that one knows when things are changing. Flynn Rider - or should we say, Eugene Fitzherbert - is no different. Oneshot. Rapunzel/Eugene
Everyone's heard the phrase "Don't judge a book por it's cover", and so has Rapunzel. In this version of the movie, Rapunzel will learn the meaning of that phrase first-hand.