Well in my family I am the oldest of 4 boys.
Now My Parents never being able to bear any daughters have 5 granddaughters and 1 grandson and 1 step-grandson.
My Brothers and I managed to sire up until my nephew Jake was born 2 years ago all girls. Kind of a weird thing. My parents tried and tried to get a daughter thus resulting in 4 boys but no luck. They spoil the hell out of the grandkids though as a result of not having any daughters
The fun part is seeing who they take after. While I have personally met Michael I have never met his wife only seen pictures.
I would say the oldest girl takes after the mother and the middle one takes after Michael in looks. The baby too early to tell