I was laughing with a mom that is expecting her third in August that your expectations for newborn pictures exponentially decreases with each child. Basically, she just asked me to get a photo without vomit or poop in it. I feel like parenting in general is like that...your expectations of perfection exponentially lowers each day. I just want no fighting or whining for an hour. It used to be a day but, now I'd just settle for an hour. Anyway, I think the best sessions are those you go into not stressed about creating the perfect moment or picture.
Side note: biggest sis in the picture was one of my first newborns. I can't believe I've photographed all three...and yes, the third is a boy. So happy for this family. Love seeing them smile.