Everyone's different... my hubby was ready for kids as soon as we got married. I was the one who wanted to wait/wasn't sure if I wanted them at all. I don't know if I can really put a finger on what made me change my mind. Maybe it really was my "biological clock".
I really wasn't even thinking about kids at all and one day a random person at work announced their pregnancy and I had a feeling inside of "I want to be a Mom" and it really surprised me. I mulled it over for a couple more months before deciding for sure. But in the grand scheme of things, my feelings towards kids changed really fast in the span of about 6 months from "not sure if I'll ever have them" to "I definitely want them".
As for marriage, well, I'd been with my husband for 5 years before we got married and I really couldn't imagine spending my life with anybody else. So it was kind of a no-brainer for me/us.
