Wow, well I know when I discovered I was trans recently, and I'm not a young lad, I have to realize it's taken me years better said 'decades' for me to come to terms with who I am, I can't imagine it will take friends, family and parents any less time.
Plus, we have to realize that our parents either planned us out (or not) and found out we were female, then bought all the pink stuff. They then imagined having a typical baby girl then a teen daughter then... then; That's a lot of time daydreaming, planning and wishing we've erased from their mental vision on how life would be for them and their daughter. I don't know. It's not easy for anyone involved that's for d@mn sure.