Corrected entry: It is impossible for the middle child, Teddy, to have been Emma and Flap's son. Teddy has big brown eyes. Both parent's have blue eyes. It's genetically impossible for two blue eyed parents to produce a brown eyed child. As far as I'm aware, that's because the brown gene is dominant, so in order to have blue eyes, both genes/chromosomes (long time since biology lessons...) have to be "blue", meaning there are no brown genes to be passed on.