1) For decades the senior physician/godfather of the FL has been told his daughter was A) Born at an earlier date and B) Had *BLONDE* hair by someone they trusted. Why would he or his family suddenly think a random assistant he has is his daughter??
2) The FL heard the ML say he doesn't want his mum to adopt the FL and the manner in which he said it made it seem like he didn't like the Commoner status of the FL
Being academically gifted and having situational & social intelligence ( ̄∇ ̄")
I'm surprised how many commenters don't seem to be aware of it lol.
Another big thing, stop stressing yourselves
Relax!- bask in the joy of *suspension of disbelief*
Believe me. It makes so many plots better