How do you know when you’re done?

H 💍👧🏼👶🏼🤰🏼

Our second daughter was born a couple of weeks ago. I have no intention of deciding anytime soon, but I’m just wondering how everyone knew when they were done? I’ve really gone back and forth on whether or not we should try for a third. We won’t decide until our littlest is at least 1 or 2, but it’s something I’ve been thinking about. Thanks in advance!