I don't know. Some days dh says he's done, some days I think 2 feels right and even catch myself saying "when ds2 is in school, I'm going to go back..." Then I realize that I'm unconsciously planning our future with 2 children.
It's weird though because dh and I always had 3 in our minds and I was always thinking I'd be fine with 4.
We'll see. It's really hard for us to think logically with so little sleep.