We were six {the other three were older and out of the house} and we made a parade marching around Disneyland.
I only have three kids and I often catch myself saying 'Dang, can you believe how many kids they have?' about a family of 4....in front of my sis & friend with 4 kids.
I think they can do it because they control everything. My friend with 4 kids, they go to school and church, all of the outside {i.e. 'normal'} activies are a lot to deal with.
And, at my age, I know women who want more kids. I do not. I love babies and I miss them but I will enjoy them when then are in my life...from someone else. The urge isn't so great to make me do something rash.
I do keep asking my daughter to bring her friend over with the little one...