Flynn Rider: Did I ever tell you I've got a thing for brunettes?
Rapunzel: I have made the decision to trust you.
Flynn Rider: A horrible decision really.
Flynn Rider: The party lasted an entire week, and honestly, I don't remember most of it.
Mother Gothel: Rapunzel, please, stop with the mumbling. You know how I feel about the mumbling. Blah blah blah blah blah, it's very annoying! I'm just teasing, you're adorable. I love you so much, darling.
Rapunzel: Who's that?
Flynn Rider: They don't like me.
Rapunzel: Who's that?
Flynn Rider: They don't like me either.
Rapunzel: And who's *that*?
Flynn Rider: Let's just assume for the moment that everyone in here doesn't like me!
Flynn Rider: This is the story of how I died. Don't worry, this is actually a very fun story and the truth is, it isn't even mine. This is the story of a girl named Rapunzel.
Flynn Rider: I didn't want to have to do this, but you leave me no choice. Here comes the smoulder.
Flynn Rider: You should know that this is the strangest thing I have ever done!
Rapunzel: Something brought you here, Flynn Rider. Call it what you will... Fate... Destiny...
Flynn Rider: A horse?
Flynn Rider: I have got to get me one of these!
Rapunzel: I can't believe I did this. I can't believe I did this! Mother would be so furious. That's okay though, what she doesn't know won't kill her? Oh my gosh, this would kill her. This is so fun! I am a horrible daughter. I'm going back. I am never going back! I am a despicable human being. Best day ever!
Rapunzel: So mother, earlier I was saying tomorrow is a really big day, and you didn't really respond, so I'm just gonna tell you: IT'S MY BIRTHDAY! Tada!
Mother Gothel: No no no, can't be. I distinctly remember, your birthday was last year.
Rapunzel: That's the funny thing about birthdays, they're kind of an annual thing.
Answer: It's entirely possible. Rapunzel has a similar face appearance to her mother's, and you could also count the family bond of simply knowing. She also has green eyes, which are uncommon, so the parents probably knew that she was unlikely an impostor.
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