I think you just know. I have always known that I want kids. It's never been a question. My sister, on the other hand, has never wanted kids. She just doesn't.

In my experience, the women I know personally who were ambivalent about having kids (or really didn't want them) but had them anyway because either their husbands wanted them or they got pregnant accidentally have struggled with motherhood. I truly believe that not everyone is cut out to be a parent. It's a LOT of work and if you aren't 100% invested, it can be very difficult for the parent and damaging for the child. Kids have an uncanny ability to sense whether they are really wanted and loved (or not).

Take the time to really think about it. If you really want to do it, go ahead! If not, don't do it just because your husband wants to (you really have to want to also!)